Top Cases of Bad Performances in Good Films

Obviously my tastes may not come close to lining up with yours, but hopefully there's some common ground here.
The items in this list have been selected by the author of the list for you to vote and comment on.
The Top Ten
1 Franklyn Seales - The Onion Field

Interesting true story with plenty of good performances, but Seales is one of the worst actors I've ever seen. He gives a distractingly bad performance whereby his voice somehow seems to belong to someone else and just puts you off. He's also as subtle as Eric Roberts at his most mannered.

2 Jason Robards Jr - Julius Caesar

I've said before in my Worst Cases of Miscasting list that Robards was an excellent actor of stage and screen, but Shakespeare just wasn't his thing. He's a walking stiff in this, surrounded by an otherwise excellent cast.

3 John Cusack and Alan Rickman - The Butler

So equally miscast and terrible in the same film I had to list them together. Rickman at least tries to convince as Reagan, but as LBJ Cusack (who similarly put no effort in playing Brian Wilson in "Love and Mercy") puts in the bare minimum. They both stand out like sore thumbs.

4 Mark Wahlberg - Planet of the Apes

One of the most disinterested and illusion-shattering performances you'll ever see. Shame, I actually liked Tim Burton's vision here.

5 Julianne Moore - Magnolia

Strong film with a great cast, but Moore is a cold fish who doesn't sell the character's change of heart at all. She also has two unintentionally comedic moments, one involving a lewd confession that should never have made through the second draft.

6 Kim Basinger - L.A. Confidential

The most controversial entry. Yes, she won an Oscar for it, and she was the least deserving member of the entire cast. She's always been a weak and mousy actress and she's pretty bland here. I don't get it.

7 Angelina Jolie - The Good Shepherd

An underrated film but Jolie is miscast and unconvincing.

8 Mia Farrow - Broadway Danny Rose

It's a solid film but Farrow never convinces for a second, nor is she even funny.

9 Vera Miles - The Man Who Shot Liberty Valance

The one weak link and sadly she's the female lead. It's a big deal. Classic film, though.

10 Laurence Harvey - The Manchurian Candidate

Stiff as a board in a crucial role. He gets out-acted by everyone else.