Darth Maul would be my first pick (and I agree that he should've been alive the whole series). A close second Mace Windu who didn't do too much but he had this presence that when he did cut loose it was going to be bad ass (very similar to Boba Fett.) I think it's more how the other characters seem to defer to him more than anything else.
I don't think it really makes sense to put Cody up there unless we're taking the cartoon into account. Cody really doesn't do much more than the fifty other guys who look just like him.
hahaha yeah i would say Darth Maul is the Boba of the PT, he just ahs that mysterious auroa to him ya know