It's funny, I'm another who knows nothing about Marvel except what the movies had, and I loved the Thor movies the most because of the lore building LOL. But then I've said I get tired of later Captain American movies because "Things are too realistic and down to Earth, if there's superheroes I want things to get WEIRD.
But I want to say, as much as I love the other two Thor movies, I agree with you, Ragnarok is the best one. It did a fantastic job of building quite a lot of lore while being absolutely hilariously entertaining. But if you like Guardians of the Galaxy, I suggest you look up the TV show Farscape. When GotG was advertised I told my friends "I've always wanted to see Farscape on the big screen" so you might like it.
The only way I ever got through ANY of Tolkien's books was being read to by Andy Serkis while I was working at my job. It's worse when it's Tolkien somehow goes out of his way to write about the absolute most boring parts in excruciating detail, sets up all the drama, things are getting tense, oh shit, shits gonna go down "And that's when the Battle of the Five Armies happened. Afterward..." OH COME ON! Hell I wondered if I just couldn't read on a high enough level then devoured Herbert with Dune so easily it's, no... no I can't stand Tolkien's writing.
And I will die on the hill against anyone who thinks Tom Bombadil needed to be in the movies. That was a shit part in the book that took away any character agency from the main characters for an absolutely pointless diversion.