I think that Tim Stoker is by far the most compelling character in the Magnus Archives. It’s a shame he didn’t make it to the final season. It was nice having him die taking down the Unknowing, but his character could have gone so many cool places if he had survived.
However, I am still peeved that he pulled the whole “I don’t forgive you” line. It’s one thing to not forgive someone, but you don’t have to make confirming it the last thing both of you will ever hear. You can just… not say anything at all! It isn’t like Jon didn’t know. Have mercy, man.