Non-Retired Bishop Robert Lynch of St. Petersburg, FL
This one has always bothered me, because I live in Florida, and also because I remember his disgraceful behavior at the time of Terri Schiavo's death by starvation.
He was famous for taking pictures of young male diocesan employees in Speedos (which he had given them!), and of course pursued one employee so hotly that the man finally sued him and won. He was also involved in a peculiar financial scandal involving no-bid contracts for diocesan construction. And then, during the Schiavo affair, he was away from his diocese at Easter, visiting Bangkok(!). Yet he is still a bishop in good standing and I have never heard a word of admonishment to him from either Rome or his fellow bishops.
The only thing I knew about him was how invisible he was during the Schiavo fiasco.
"I don't think any changes are going to occur until the Pope does something dramatic, like remove at least one bishop."
I nominate Bishop Lynch.