i'm on the same spot as you OP, it has been a few weeks without any nice big wins... i think the highest win i had was 500x on ze zeus by Hacksaw some time ago.
I think the question would be better if it asked which provider gave you the most wins. For me, its Hacksaw Gaming and BGaming.
same, i been playing ze zeus and le bandit a lot lately, they don't pay huge, but they don't rinse you completely either.
I've already avoid Pragmatic Play I wont play their slots anymore. It’s so hard to win on Pragmatic slots..
i have pragmatic play completely blacklisted after doing 25 back to back $20 bonus buys on gates 1000, and not a single bonus hit more than 100x.