Beware, Winz has changed basically all of their games to their low RTP version.
Been playing there since the first week of its release.
Winz is meh, one of the few casinos where I have I made only about 80% of my money back.
X7casino(cancel bonuses at any time, bazillion of tournaments where everyone has a chance - 500 spins per tournament, on any slots)
Slotsgallery & Bohocasino (sisters)
Getslots
Luckyelfcasino
Slotum
Kingbillycasino(ALL high RTP)
These here offer almost 99% of their games in the high RTP Variant, massive bonuses and solid VIP managers.