I have to pick categories, not single toylines.
1) Legos + Clones
2) Giant Robots (From Shogun Warriors to the pre-G2 Transformers but plenty of Mecha stuff too, like Robotech, some even from the original lines the toys the American versions were based on)
3) G.I. Joe/Star Wars Sized figures (Zorro, Lone Ranger, Buck Rogers, Flash Gordon, Space 1999, Visionaries, Lord of the Rings from the 1978 rotoscope film, others I am forgetting)
4) Bigger Action Figures (He-Man, Mego stuff, A-Team, old G.I. Joe, many more I am forgetting)
5) M.A.S.K. Scale figures (Wheeled Warriors, I know there were others this size but they are escaping my memory at the moment)
6) Miscellaneous stuff (Tons of army men, the fantasy versions of the army men, gaming minis from all the early companies, etc.)
Between generous relatives and too many trips to swap meets, I had at least a few toys from most American released toylines from 1976ish to late 80s (maybe a few into the 90s). Typically they would get mixed in the above categories for play rather than be stored as separate toylines (the Lego vault seemed to end up with lots of non-Lego style toys, I think Mom just tossed loose toys in there by default). When we started to
RPG/Wargame, lots of the old toys were cannibalized for parts for vehicle conversions, terrain or the like, especially the Navarone set, Star Wars playsets & G.I. Joe/M.A.S.K. vehicles.