Big thanks to Trickster and his civ5 guide 
Same rules than other similar threads, +1 vote for the one you like and -4 vote for the one you dislike. 1 vote per 24 hours(per day).
Let's roll!!!
African Forest Elephant : Replaces horseman, 25 production/50 faith more expensive, +2 combat bonus, -1 movement, -10% combat to enemy units that are adjacent, greatly increases great general generation.
Atlatist : Replaces archer, -4 production cost/ -16 faith cost, does not require Archery technology
B17 : Replaces bomber, free Evasion and Siege 1 promotions, +5 ranged combat bonus
Ballista : Replaces catapult, +1 melee combat bonus, +2 ranged combat bonus
Battering Ram : Replaces spearman, +19 production cost/ +38 faith cost, -1 combat penalty, free Cover 1 promotion, +300% combat bonus versus cities, no defensive terrain bonus, -33% defending penalty, -1 visibility, may only attack cities, no bonus versus mounted units, upgrades into trebuchet
Berserker : Replaces longswordsman, +1 movement, free Amphibious promotion.
Bowmen : Replaces archer, +2 ranged and melee combat bonus
Camel Archer : Replaces knight, replaces standard knight attack with 21 ranged combat and 17 melee combat scores
Carolean : Replaces rifleman, free March promotion
Cataphract : Replaces horseman, +3 combat bonus, -1 movement, -8 penalty attacking cities(25% instead of 33%), can fortify and get defensive bonuses
Chu-Ko-Nu : Replaces crossbowman, may attack twice per turn, -4 ranged combat penalty
Companion Cavalry : Replaces horsemen, +2 combat bonus, +1 movement, increased great general generation
Conquistador : Replaces knight, +15 production cost/ +30 faith cost, no penalty attacking cities, +2 sight, double combat score when embarked, may found cities on foreign continents not connected to capital
Cossack : Replaces cavalry, +33% combat bonus against weakened enemies
Dromon : Replaces trireme, -2 combat bonus but the only ranged unit of his group(10 ranged combat bonus), bonus vs naval(50%) but loses his bonus when upgraded
Foreign Legion : Replaces great war infantry, +20% combat bonus outside friendly territory
Hakkapeliitta : Replaces lancer, great generals gain movement bonus if stacked with this unit, +15% combat bonus if great general is stacked with this unit
Hoplite : Replaces spearmen, +2 combat bonus.
Horse Archer : Replaces chariot archer, +1 melee combat bonus, rough terrain no longer consumes all movement, free Accuracy 1 promotion, does not require horses
Hussar : Replaces cavalry, +1 movement, +1 sight, +50% flank attack bonus
Hwach'a : Replaces trebuchet, -1 melee combat penalty, +12 ranged combat bonus, no limited visibility, loses +200% combat bonus versus cities
Immortal : Replaces spearmen, +1 combat bonus, heals at double rate
Jaguar : Replaces warrior, +33% combat bonus in jungles and forests, heals 25 health whenever it kills a unit, free woodsman promotion
Janissary : Replaces musketman, +25% combat bonus on the attack, heals 50 health when it kills an enemy unit
Keshik : Replaces knight, replaces standard knight attack with 16 ranged combat and 15 melee combat scores, +1 movement, increased great general generation, +50% experience earned
Landsknecht : Replaces pikeman, -45 production cost/ -90 faith cost
Legion : Replaces swordsman, +3 combat bonus, can construct roads and forts
Longbowman : Replaces crossbowman, +1 ranged
Mandekalu Cavalry : Replaces knight, -10 production cost/ -20 faith cost, no penalty attacking cities
Maori Warrior : Replaces warrior, causes enemy units to be at -10% combat strength if next to this unit
Mehal Sefari : Replaces rifleman, -25 production cost, free Drill 1 promotion, +30% combat bonus when fighting in the capital (bonus reduces as the unit gets farther away)
Minutemen : Replaces musketman, ignores movement terrain penalties, free drill 1 promotion
Mohawk Warrior : Replaces swordsman, +33% bonus in forests or jungles, requires no iron
Musketeer : Replaces musketman, +4 combat bonus
Naresuan's Elephant : Replaces knight, +5 combat bonus, -1 movement, +50% combat bonus versus mounted units
Norwegian Ski Infantry : Replaces rifleman, double movement in snow, tundra, or hill; increased combat score in snow, tundra, or hill without forests or jungles
Panzer : Replaces tank, +10 combat bonus, +1 movement
Pictish Warrior : Replaces spearman, +20% combat bonus outside friendly territory, no movement cost to pillage, 50% of the enemy's strength is converted to faith
Quinquereme : Replaces Trireme, +3 combat
Samurai : Replaces longswordsman, greatly increased great general rate, free Shock 1 promotion
Sea Beggar : Replaces privateer, free coastal raider 2 and supply promotions
Sipahi : Replaces lancer, +1 movement, +1 sight, can pillage at no movement cost
Ship of the Line : Replaces frigate, -15 production cost, +5 melee combat bonus, +7 ranged combat bonus, +1 sight
Slinger : Replaces archer, -1 melee combat penalty, may withdraw from melee attack
Tercio : Replaces musketman, +10 production cost/ +20 faith cost, +2 combat bonus, +50% combat bonus versus mounted
Turtle Ship : Replaces caravel, +16 melee combat bonus, cannot enter deep ocean
War Chariot : Replaces chariot archer, +1 movement, doesn't require horses
War Elephant : Replaces chariot archer, +16 production cost/ +28 faith cost, +3 melee combat bonus, +1 ranged combat bonus, -1 movement, entering rough terrain no longer consumes all movement, doesn't require horses
Zero : Replaces fighter, +33% combat bonus versus fighters
Final ranking
1. Keshik
2. Chu-Ko-Nu
3. Longbowman
4. Janissary
5. Camel Archer
6. Minutemen
7. Carolean
8. Ship of the Line
9. Horse Archer
10. Sea Beggar
11. Battering Ram
12. Dromon
13. Jaguar
14. Legion
15. Companion Cavalry
16. Mohawk Warrior
17. Foreign Legion
18. Hussar
19. Immortal
20. Hwach'a
21. War Elephant
22. Pictish Warrior
23. Landsknecht
24. Naresuan's Elephant
25. Tercio
26. Conquistador
27. Ballista
28. Berserker
29. Musketeer
30. Cataphract
31. Atlatist
32. Samurai
33. African Forest Elephant
34. Cossack
35. B17
36. Mandekalu Cavalry
37. Sipahi
38. Quinquereme
39. Panzer
40. Norwegian Ski Infantry
41. Mehal Sefari
42. Bowmen
43. Turtle Ship
44. Hakkapeliitta
45. Hoplite
46. Slinger
47. War Chariot
48. Maori Warrior
49. Zero
Same rules than other similar threads, +1 vote for the one you like and -4 vote for the one you dislike. 1 vote per 24 hours(per day).
Let's roll!!!
B17 : Replaces bomber, free Evasion and Siege 1 promotions, +5 ranged combat bonus
Bowmen : Replaces archer, +2 ranged and melee combat bonus
Carolean : Replaces rifleman, free March promotion
Cataphract : Replaces horseman, +3 combat bonus, -1 movement, -8 penalty attacking cities(25% instead of 33%), can fortify and get defensive bonuses
Hoplite : Replaces spearmen, +2 combat bonus.
Hwach'a : Replaces trebuchet, -1 melee combat penalty, +12 ranged combat bonus, no limited visibility, loses +200% combat bonus versus cities
Mohawk Warrior : Replaces swordsman, +33% bonus in forests or jungles, requires no iron
Musketeer : Replaces musketman, +4 combat bonus
Quinquereme : Replaces Trireme, +3 combat
War Chariot : Replaces chariot archer, +1 movement, doesn't require horses
Zero : Replaces fighter, +33% combat bonus versus fighters
Final ranking
1. Keshik
2. Chu-Ko-Nu
3. Longbowman
4. Janissary
5. Camel Archer
6. Minutemen
7. Carolean
8. Ship of the Line
9. Horse Archer
10. Sea Beggar
11. Battering Ram
12. Dromon
13. Jaguar
14. Legion
15. Companion Cavalry
16. Mohawk Warrior
17. Foreign Legion
18. Hussar
19. Immortal
20. Hwach'a
21. War Elephant
22. Pictish Warrior
23. Landsknecht
24. Naresuan's Elephant
25. Tercio
26. Conquistador
27. Ballista
28. Berserker
29. Musketeer
30. Cataphract
31. Atlatist
32. Samurai
33. African Forest Elephant
34. Cossack
35. B17
36. Mandekalu Cavalry
37. Sipahi
38. Quinquereme
39. Panzer
40. Norwegian Ski Infantry
41. Mehal Sefari
42. Bowmen
43. Turtle Ship
44. Hakkapeliitta
45. Hoplite
46. Slinger
47. War Chariot
48. Maori Warrior
49. Zero
Now we can't make heads or tails of the votes 
