I've found that different people disagree on what's reconcilable and what isn't.
Agreed. In my personal continuity, I have no problems with the Kirk on Excelsio
r and Spock on Surak
comics set between ST3 and ST4, although many dismiss them as incompatable.
I find the first run of DC Comics very awkward to reconcile with the rest of Trek, I must admit. The first couple of issues had the Enterprise return to Earth immediately after the incident with Khan, and Kirk get demoted to captain, but he's suddenly an admiral again in TSFS. Then there's the character of Konom, a renegade Klingon who joins Starfleet, whereas televised canon dictates that as of the 24th century, Worf is the only Klingon to have ever served on a Federation starship.
Things only get trickier in the comics set between TSFS and TVH. For one thing, there's the fact that the Excelsior is portrayed as being huge enough for Kruge's bird-of-prey to fit inside its shuttle bay. And why was it left in there so long anyway?