M/M book recommendations

I just read “We Could Be So Good” by Cat Sebastian and adored it. What are some other m/m books that have a happy ending?

Some things I like that might help: - I LOVE early-mid 1900s era - I don’t mind NSWF - Trans characters would be a nice bonus - Strongly prefer low conflict books - Historical or realistic fiction preferred but not a requirement - My favorite book ever is Aristotle and Dante

Thank you so much!!! :)