Anecdotally Fifa (EA FC or whatever they’re calling it now) would have to be up there. Hadn’t played it in years but gave it a go last season as it was free on Game Pass.
They’ve combined the addictiveness of card collecting with loot box mechanics, FOMO and moving the goalposts (pun intended) to get the best players. The gameplay also seemed pretty rigged to prevent grinding rewards out.
Then when the new game is out, rather than dishing out all the rewards to those still playing it instead becomes infeasible to unlock any more decent players so you’re pretty much stuck with what you have.
Even if you pay full price for the next game you’ll have to use low stat players as they only seem to start releasing decent ones half way through the season.
For old school RTS, Total Annihilation or if you fancy something a bit different then The Settlers II (Pioneers of Pagonia is a more modern remake). I grew tired of RTS and moved on to turn-based but Stellaris is one that recently drew me back in.
For tactics I’d say Advanced Wars, Fire Emblem and Disgagea are decent shouts. Into The Breach is probably my favourite indie of the genre, a lot of strategy packed into a small game.
If you like turn-based then Civ has always been top of my list.