Two of them stood out for me:
Tim Curry as Ar Howe, who is in all sorts of games according to his bio.
The first thing that came to mind when I saw his name in the credits was Clue
and then RHPS
http://en.wikipedia.org/wiki/Tim_Curry
My fave is, of course, Captain Janeway herself, Kate Mulgrew as Flemeth!
http://en.wikipedia.org/wiki/Kate_Mulgrew