I think Compendium 3 takes you up through the war with Negan, and the start of the Whisperers. It ends around where several folks get their heads cut off and mounted on posts as a warning to Rick's group. That's just going from memory, though. I gather there's a bunch of intra-group political struggles and squabbles at Hilltop that happen later, plus some kind of fight with the Whisperers, and then I have no idea where it goes because I stopped caring. The show wasn't interesting anymore, the comics weren't interesting, I just dropped the whole thing, really.