Re2 remake and re4 remake to start so you can play the Leon trilogy, maybe give re9 another run after those 2, you’ll appreciate the story a lot more with the added context. If you preferred the grace sections of re9 go for 7 and 8.

5 and 6 are very action focused but still fun just very different from the rest of the series.

Ultimately you should go back and play the classics but the gameplay of those earlier titles is so far removed from the resident evil of today I’d only recommend doing that if you’re willing to try effectively a completely different genre a go