Unfortunately I've been trying to do this for several months, but I can't make it happen. We're at plan B, which is letting go of it. I'm not going to change who I fundamentally am; I've helped these guys get what they said they wanted, which is a pretty successful band on our own terms, and if I were to become more demure or start hiding my sense of humor (which is also a big part of why our stage act works) then I wouldn't be putting forth my authentic and best self. So my feeling is they can take it or leave it but I'm more inclined to leave it at this point and let them pick up the heavy lifting.
Sorry for lengthy reply, but I'm coming into this late. tl;dr: LBS, you be you!
Nor should you change. I have to say, LBS, that I've been reading your comments for quite some time now, and even when you seem agitated or upset about something (which isn't often) you are always thoughtful in your comments, observations, and advice. I'm similarly somewhat sarcastic and I often step in it sometimes, but your self-awareness means you're not difficult or overbearing, by the sound of it, so if anyone has a continuing problem with that, it speaks more to their lack of self-confidence perhaps. I like to ascribe to the Ryan Reynolds School of Sarcasm myself--snark without meanness--"Since my timing was all over the place on that last song, I feel like I'm the only person properly qualified to remark on how bad our timing was."
From everything you're saying, it certainly sounds, among other things to be a problem he has with capable, expressive women. So there's that, and other than a come-to-Jesus moment for him, not sure how that gets resolved. In my experience, bands pretty much always have to have a "band leader" to corral players, repertoire, gig schedules, etc., but I've never been in a good band where either the band leader is overbearing, there is no band leader (anarchy), or there is a good band leader but not everyone pitches in or shows teamwork. Stepping back and letting someone else take the reins sounds like a good strategy.
But I'm concerned that if this guy is so obviously p-a, why the other members don't step up and self-police. If you've got a good thing going with that band, and the others feel the same way, then they need to come together to fix things. Maybe stepping way back will make that clear. Most people don't feel the need to step forward to fix things until the person who so obviously was good at it, isn't doing it anymore.
But yeah, like others have said, life's too short. I'm 59, gainfully employed, and looking for joy through music, not livelihood, so my tolerance for bovine excrement has reached an all-time low.