Right now Robert DeNiro is at the top of my list for his public disrespectful outbursts against Trump. Oprah is also not a favorite of mine since she put on that pre-planned, rehearsed interview with the self-promoting liars, in my opinion.
His Royal Orangeness. Tantrums aren't pretty in toddlers, they're not to be tolerated from septuagenarians. He's like the little boy who took his bat and ball and went home crying to Mommy because the nasty umpire said "Yerrout!"
I think Trump and Cosby are both very dislikable for the obvious reasons.
I'll add pseudo-celebrity "journalist" and future inmate Alex Jones. I don't think he believes half the lies he propagates and he clearly does it for his own personal gain (e.g., his 'doomsday' kits). His venom is at least partially responsible for countless murders committed by some of the most deranged of his followers. Karma will find him, I trust.
Slartibartfast 