The list of custom voice work from (“famous”) actors is very low in general, so more than 2 would be very unusual. The duals that I can think of offhand have already been mentioned (no custom work from Sylvester McCoy, sadly, but good catch on him joining the two-pin club (even if just “grabbed from source” multiple pins is still fairly unusual) - I pointed this out awhile ago, perhaps on a pinside thread).
The # actors with non-custom work goes pretty high… Again this was on a pinside thread I think, but Harrison Ford I believe is the leader with 5 (should be obvious which 5). Number two is much less obvious with 4.
[details=2nd place spoiler]Alfred Molina[details=Which 4 games?]
Good work if you knew that whole answer on your own.
Pat hasn’t done any voice work AFAIK other than in DI. Certainly not FunHouse.