I think I'll be participating in this... XD
2) Ladd Russo
1) Lord Genome
I would have also nominated Clare Stanfield if I had room and knew the official spelling for his name. :( Kino (I'd say she's pretty GAR) and the Juushin Enbu characters are eligible too, but Gurren Lagann had too many GAR characters who've won my loyalty. (Though I didn't nominate Viral because he's equally moe as he is GAR.)
EDIT: Okay, so people are voting Claire Stanfield, Clare Stanfield, Vino, Rail Tracer....THIS IS CONFUSING. He better make it in with at least one of those names. :|
EDIT 2: Non-immortal characters in a cast full of immortal characters who still manage to kick ass and take names = epitome of badass, along with piercing the heavens, doing the impossible, and kicking reason to the curb. That's my reasoning.