Ps2 Mortal Kombat games were the best, they have beem sliding ever since.
Deadly Alliance is a slog for story/Konquest but a fun game.
Deception is so so good, one of my favourite games ever. Doesnt really hold up as well as Id like but it has brilliant features that I miss in every modern iteration. Namely the best konquest implementation. Chess Kombat.
Shaolin Monks, another one on par with Deception. I have to replay this next.
Armageddon is carnage, just fun fun all the way through. Every character from the entire run of the franchise is playable, it is everythimg.