Camel Archer 38
Carolean 38
Chu-Ko-Nu 39
Cossack 1
Impi 37
Janissary 37
Keshik 41
Longbowman 41
Naresuan's Elephant 15
Pathfinder 40
Sea Beggar 24 - Cossack will die soon anyway, so i'm gonna downvote this (yes, i prefer stampy over this). So, Sea Beggar is nice unit and all, but i think SoTL is best ship. Naval melee units are far more limited and map dependent than naval range units. You see, SoTL can fire units on shore, while sea beggar is limited to cities and naval units. Even though getting logistics on Beggar is rather easy, 5 movement isn't enough to move 2 tiles, attack twice, and retreat 2 tiles (you can open exploration to make that possible, though). Problem also is sometimes huge defense strength of cities, and since naval melee units take damage on attack, even though supply will help with that, damage usually is far more than just 15 hp.
Ship of the Line 36 - Best ship, powerful frigate that can attack anything that is 2 tiles from coast or less. Combined with English UA, they can be super fast powerhouses, once you get logistics you can sail circles around those sea beggars. 35 ranged strength for renaissance unit is huge, it's more powerful than gatling guns. Even though it only has extra strength, that extra strength lasts for a long time, battleships don't come until late modern are.
Siege Tower 31