Doing a Murder Mystery marathon, any suggestions?

Saw Haunting In Venice last weekend and liked it despite its flaws. Now we’re some people who want to watch or rewatch a bunch of murder mysteries. We already did the Branagh Poirot trilogy, done Knives Out and Glass Onion, and of course ultimate classics like Clue and Seven are on the list.

What are your favorites? Your hidden gems we should watch?