If you look closely, you'll see that Marvel basically has three Thanoses. There is the 1970s Thanos appearing in the movies. This is before he got the Infinity Gauntlet. Then there are the Thanos stories I'm telling. And finally, there is the Thanos that appears in the mainstream Marvel stories.
When I was a kid, there was this neighborhood beer and wine store that sold old comics for a nickel a piece. I'd load up on old books whenever we went on vacation. Yeah, I have a lot of fond memories of riding in the back of the ol' station wagon and reading 'Mystery in Space' and 'Strange Adventures' as we headed up to Torch Lake.