It’s been awhile, but as Martin writes, “once more into the breach”! Here’s the clue:

So, a Scottish actor, a list of roles, and I’m guessing some hints as to what that particular role is. Have at it!

UPDATED: Linda and I have done some sleuthing, and we think it’s John Stahl. Been in Loch Ness, in a play based on Frankenstein, “The Kingdom of Bones”, “The Slipper Slope”, and “The Malingerer” are episodes of various TV shows he’s appeared on, he’s Scottish, has played an inspector, and a fisherman (in Loch Ness), and a minister as well. As to the role, bits of the clue make me wonder if they haven’t bumped Lord Karstark up to a full-on role… but otherwise, the only other character that really comes to mind at the moment is Qhorin Halfhand.