Well my list would be different if it was ranking it by "best"
1. Inception: for me the most inherently rewatchable. I don't think Nolan fully sticks the landing with the wider concept of invading dreams as I found some of the concepts in the last act distractingly silly. But despite being an imperfect concept, it's still a very entertaining one to me and one that created plenty of fun action/visual effect set pieces.
2. The Dark Knight: Not much to say. It's not perfect by any stretch but it's a super polished superhero movie that's really more of a high stakes detective thriller. Ledger's joker remains inherently captivating and one of, for my money, one of the best movie villains in that the Joker truly elevates the narrative, drives the plot, and commands the screen with his presence.
3. The Prestige: everything beyond the Prestige is kind of like "yeah I'd re-watch it if someone asked me to" but the Prestige is the last of the Nolan movies that I'd really feel like going back to to have a fun movie viewing experience. Not much to say about the plot. It's just a fun story.
(The rest are interchangeable)
Interstellar would win more points with me if it wasn't for the last act being totally preposterous; visually impressive movie though.
Dunkirk is solid but having seen it 3 times now I don't feel like I have much reason to see it again. 1917, to me, is a better WW1 movie from the past decade.
Batman Begins I've seen four times but for whatever reason it just never resonates with me. Nothing about it makes it inherently memorable or special to me.
The Dark Knight Rises is almost great but there's some truly stupid writing decisions that take me out of it (like every police officer in Gotham going into and getting stuck in the sewers to allow Bane to hatch his plan when the threat of the bomb is good enough on its own)
Tenet has some really entertaining action but the story is really messy. And after watching it twice, I have no desire to go back.
Memento is a solid entry in his early works but having seen it twice, I don't feel compelled to watch it again. The plot unraveling the first time is compelling. Second time as a reminder of what it was all about, but not as fun just remembering revelations I'd already seen.
Oppenheimer I may come back to 2 or so more times for the excellent performances but it being a three hour talk heavy flick, I don't see that much entertainment value from repeat viewings aside from taking in and enjoying the acting.
I haven't seen Insomnia.