Significant Digits is (or was, a few years ago) considered the best one, to my recollection.
Has the last decade conceived of any ideas for an hpmor 2: Harry Potter and the Science Fantasy, maybe?
I quite enjoyed the fan-written sequel Significant Digits: https://www.anarchyishyperbole.com/p/significant-digits.html?m=1
Significant Digits is (or was, a few years ago) considered the best one, to my recollection.