That's true. Didn't think about the whole "frontman" aspect of it. Your singer definitely needs to be comfortable in front of other people. If he has good showmanship, great, but if he doesn't, then he better make up for it in singing skills.

You probably won't be playing on stages any time soon if you are just starting out, so don't worry about showmanship too much at this point. Just know that when you do play for others, you are putting on a show. It's entertainment. Nobody wants to just sit and watch people playing an instrument. They want to be entertained. If your frontman can't do this, it'll be tough to keep your audiences attention.