Dishonorable mention(utter rubbish):
Gandhi: Population Growth -- Good for late game expansion, but late-game is soo unimportant...
Augustus: Glory of Rome -- Their UUs are good, but horseman are better, so...
Washington: Manifest Destiny -- Saves a descent bit of gold, but not enough to matter early on.
Catherine: Siberian Riches -- Selling resources brings a bit of small coin. Horses are to common to be an issue 90% of the time, so resource limitations rarely come into play with other civs.
Elizabeth: Sun Never Sets -- AI rarely builds a navy
Harun al-Rashid: Trade Caravans -- +1 gold per trade route...really...thats it?; gameover before oil makes impact
Montezuma: Sacrificial Captives -- Has to kill a unit every turn to get half of what the French get for doing nothing.
Suleiman: Barbary Corsairs -- Waste time building a boat to get units I will disband for small coin. Um...no thank you...
Hiawatha: The Great Warpath -- They're kidding right...it doesn't even work outside your own territory