Perhaps you've pinpointed my (and maybe your own) innate sense of why ventriloquism seems necessary to feel like I've succeeded as a performer. Like you Wheels, I was obsessed with Ventriloquist dolls for years as a kid and saved all my pocket money to buy what was a pretty poor Charlie McCarthy knock off. I still have him although he doesn't get much of a work out these days. I think even as a puppet builder now I'm subconsciously building puppets I intend to use as vent figures rather than moveable, performing puppets.
I've been re-watching entire series of Muppets, Fraggles (instant lobotomy!!!

), Labyrinth, Dark Crystal, Thunderbirds etc to reacquaint myself with the type of puppetry I think I initially feel in love with, in an attempt to combat this stupid mind set. So far to no avail!

I'd love to see any discoveries you've made of successful solo performers if you're happy to share.