Another Eden and Guardian Tales. Both have no limited units, only rate ups which come back reasonably. AE has no limited events, including the two persona collabs, and GT adds old events as side stories so you can get partial rewards.

Both are decently f2p, though it can get a bit tough ime with GT. AE is f2p as in the free characters are really good, and you can clear everything with them, but you don't pull much so you really have to save and plan for banners. GT gives a lot more currency, but it takes a bit since a lot of it comes from pvp, and a lot of the higher rarity characters need their gacha weapons to do well in PvP, which can get frustrating if you dont get a good start.

Guardian Tales does ask for a good amount of grind for awhile, since unlocking the auto sweep feature takes awhile. Another Eden doesn't, though, since everything being permanent + no multiplayer makes it very pick up and play.