I haven't played a handful of COD games, but I've played almost all of them. This would be my tier list.
S Tier: Black Ops 2, MW1 and 2, Black Ops 1
A Tier: Infinite Warfare. MW3, CODWW2, World at War, MW2019
B Tier: Black Ops Cold War [so far], Advanced Warfare, Ghosts,
C Tier-Black Ops 3, Call of Duty 2 [so far, still finishing it]
D Tier-Warzone. [I know a lot of people will dispute this, but I don't like Battle Royale games in general, and this is my personal tier list, okay? It's my opinion.]
Haven't Played: COD1, COD Big Red One, COD3, Black Ops 4
[Edit: I did not include remasters because they are essentially the same game, just with updated visuals, so aside from looking prettier, they are the same game. So technically, COD4 remastered and MW2 campaign remastered would still be S tier.]
[Edit 2: Before anyone asks, I have no plans to play Black Ops 4. I know people say the multiplayer is good, but like 70% of why I buy COD is for the campaign. Like I said, I don't like Battle Royale games of any kind, and zombies and multiplayers are more of a side activity for me, so I'm not gonna play it.]