Well, right now Garr's a total death machine as well. He's 11 levels behind Ryu (he and Nina have both been put on the B-list) and he has ATK comparable to Ryu. To put it in perspective: They both have about 250-260 Attack while Rei and Peco have arund 150 and Momo has about 220.

Oh, and yes, Peco IS turning into a death machine. He is currently at half of Rei's level (17 vs 32...and Fahl still hasn't coughed up Resist! :[ ) and currently his HP, AP, Attack, and Defense are just about equal. (Which more than makes up for his 17 Intelligence and -1- Agility.)
EDIT: Make that 18 vs 33, they both just leveled up.
HP: Rei 159, Peco 205.
AP: Rei 54, Peco 60.
Attack: Both 159.
Defense: Rei 168, Peco 173.
Intel: Rei 78, Peco 17.
Agil: Rei 78, Peco 1.

Jimminy Shinkickers. O.o;;