I’m looking for a slot that has a decent multiplier feature but isn't too volatile

[Volohovic]

You should definitely revisit the mechanics of the Double Bubble slot . The unique thing about it is the 'Bubble Line' multiplier, which appears in the base game, so you aren't just waiting for a scatter bonus all the time. It keeps the bankroll ticking over nicely. A lot of UK players stick to this game specifically because it offers a fair balance between regular wins and big payout potential.