I'm not a good person to speak on this because most show business celebrities have a "meeting the public" persona which is a very cool version of themselves and then they have the real person, the insecure, vain, wacko that comes out at home or at work. I've met quite a few of that type. That said, I knew RW's 2nd ex back in the '90s and he described a basically good person when he spoke about her.

I'm going to cheat and use someone not in entertainment, Edward Teller, the "father" of the H-Bomb. I met him in the 1990s and he seemed to be going off in every direction at once. He was defensive, defiant, proud, weirdly funny, and frightened. He was fantastically intelligent and outspoken he clearly had as many extreme facets to his personality as the subject of the bomb had in our culture. You said "interesting" celebrity, right? Teller was REALLY interesting to watch even if I didn't understand a lot of what he was saying!