However, Im also a fan of BRP. It's adaptable to pretty much everything as well. Of the two, you would need to choose what level of crunch you want in your game. Savage Worlds leans into pulpish action, whereas BRP has a deadlier vibe to it.
So really, the question is how much crunch, and what kind of feel do you want in your game?
Yeah . . . without knowing more about what kind of system the OP wants, it's hard to make recommendations. Grid based combat and minis? Theatre of the mind?
I generally go rules light with pastiches, and would probably recommend something where disparities in PCs "power-level" are mitigated by meta-currencies or narrative power.
A couple examples from designers I know, and carry on my marketplace:
Spark (generic, with world creation advice/mini-game)- perhaps with it's specific implementation of
Sig: Manual of the Primes as a guide. It's a homage to Planescape, and mechanically puts PCs with a heritage like "Fire Giant" on equal footing with PC whose is a "human garbage man." They'll certainly do different sorts of things in the game, but they have equivalent ways to contribute to the . . . narrative.
Screenplay can be used to model . . . pretty much anything, as long as you like making it feel like a TV show / movie.
It's more trad and less story-gamey than it may seem.
One specific implementation is "High Plains Samurai" which has a free 82 page
quickstart and is a pastiche of gunslinger, samurai, barbarians, and steampunk factions.
https://highplainssamurai.com/#about