See... to me, I reckon I could voice any of those male voices. But then again, maybe I just sound like that in my head and maybe not to others. These are the voices I use when I play with my toys, which sound authentic to me.

Perhaps people can record a sample of voices for roles that they're willing to play; kinda like an audition 'mix', and you can judge whether or not their voices are crap or not^appropriate for your use.