A few sources to choose from, but there are HUNDREDS of well-made movies to watch from back in the day when Hollywood actually DELIVERED. Some overlap in the lists posted, but these movies are all so good! :)
Rotten Tomatoes:
https://editorial.rottentomatoes.com/guide/100-best-classic-movies/
IMBd:
https://www.imdb.com/list/ls050138029/
Town & Country:
https://www.townandcountrymag.com/leisure/arts-and-culture/g18753561/best-classic-movies/
It is like Siskel and Ebert said years ago. “The early movie makers were raised on GREAT BOOKS and made movies of the same.
Today’s movie makers were raised on comic books.”