Try the marvel epic collections. 20 comics for a cheaper price and they are in story order and even have other titles if they deal with that story.
For thanos past check out avengers vs thanos. Even has the drax short story from logan's run!
https://www.amazon.com/Avengers-vs-T...6261474&sr=1-2
Check out marvels for a crash course of marvel history.
https://www.amazon.com/Marvels-Remas...s=books&sr=1-3