Let's see...lunavixen said:Commander Shepard goes on the list because of his/her achievements, taking down Saren and Sovereign, the Collectors and the Reapers, all with just a ragtag group of soldiers and scientists of varying abilities.
Garrus: Former Spectre candidate and unrivaled marksmen.
Tali: Daughter to a Quarian admiral and a peerless genius in matters of tech.
Ash: Very talented soldier and eventual Spectre, held back in rank only due to her family's history.
Kaiden: Human biotic prodigy and eventual Spectre.
Liara: Daughter to a well respected Matriarch, incredibly powerful biotic, and eventually becomes the Shadow Broker.
Wrex: Fearless Krogan mercenary and eventual uniter of all Krogan.
Joker: Literally the best pilot in the Alliance fleet.
Normandy: The most advanced ship in the Alliance fleet, quite possibly in all of Citadel Space.
Mordin: Former STG and unbelievably brilliant scientist.
Jack: Obscenely powerful human biotic.
Thane: Peerless Drell assassin.
EDI: Fully-functional AI with massive computing power.
Samara: Asari Justicar and therefor ridiculously powerful even by Asari standards.
Legion: The collective conciousness of the Geth Consensus.
Jacob: Generic soldier #1, though he has been part of some pretty major events in his career.
Miranda: Genetically engineered human designed to be perfect.
Kasumi: Best thief in the galaxy.
Zaaed: Former leader of the Blue Suns.
Grunt: The perfect Krogan.
Morinth: Space-succubus that's just as powerful as her mother.
Vega: Generic soldier #2, though he is an N7 qualifier.
EDI: Now combat ready.
Javik: A frickin' Prothean.
......All I'm saying is that I'd hardly call Shepard's roster "just a ragtag group".