[@vancexentan]
So I've got a few ideas for a servant to use.

[b]Diomedes[/b] - Rider - The one who wrestled with Heracles, and owned the Mares of Diomedes. AKA: One of Hercs Noble Phantasms, which are fire breathing/Man eating mares. He's mostly a savage, running around and causing trouble. He'd be the team's wild-card. 

[b]Ma Chao[/b] - Avenger - Famous general from the Three Kingdoms Era. He sought revenge against Cao Cao, is a major hypocrite, and is famous for his horse combat. But in this case, we're focusing on his Avenger stuff. 

[b]Ruggiero[/b] - Lancer - A hero from the Matters of France. He fought with Roland, slew a sea monster, and his spear is anti-magic. He's got enough combat feats to be pretty decent. 

[b]Huanhpu and Xbalanque[/b] - Assassin(s) - Mayan Hero Twins, slew the Gods of the Underworld and are pretty big deals. They mostly just sit around playing soccer. Go team.