Time-Turner Casting (was Worst-Case Casting)

[Caius Marcius]

No: HPFGUIDX 9210

Let's suppose that we could give WB a time turner, and they could 
bring their pick of acting genius of the illustrious past for HP. 
(No - let's say they were REQUIRED, since none of the names given 
below have ever outgrossed Jim Carrey or Adam Sandler) 

A few preliminary suggestions off the top of my head.

Albus Dumbledore - Alec Guinness
Minerva McGonagall - Joan Crawford
Severus Snape - Basil Rathbone (Rickman as Snape? don't make me 
laugh - Rathbone owns this role)
Rebeus Hagrid - Wallace Beery 
Gilderoy Lockhart - Errol Flynn
Remus Lupin - Ronald Colman
Sirius Black - Richard Burton 
Cornelius Fudge - Roland Young
Lord Voldemort - Peter Sellers (we usually think of Sellers in terms 
of Inspector Clousseau, but he had a special flair for darkness - 
just think of Dr. Strangelove!) 
Peeves - Benny Hill

 - CMC