I think Marvel comics between the 70s and Secret Wars in the mid-80s is Marvel's golden age. A lot of the writers had free hands to do stuff that would have been hard to do today. And there were very few if any political messages and preaching going on.
The hundred first Spectacular Spider-Man were the best in the whole run.
With Fantastic Four, you had the George Perez era.
There was Gene Colan and Marv Wolfman's Dracula.
Byrne and Claremont's X-Men.
The Sal Buscema era in Hulk (again, pre-Secret Wars).
Jon Buscema in Conan.
Jim Starlin's Captain Marvel and Warlock
Just to name some of the comics.
Interesting stuff has been made since then, but it will never reach the same level as the titles back then.