This is the one that I have, and for the most part, it's perfect. What I like most about it is there is no timer, and it's "dumb" enough that I can plug it into a smart outlet and tell Google Home to turn on the candle warmer. The outlet is configured to turn off after 2 hours (unless I turn it off before that by telling Google Home to turn off the candle warmer.
https://www.amazon.com/gp/aw/d/B09FYZ7162?psc=1&ref=ppx\_pop\_mob\_b\_asin\_title
Haha, I'm going to have to use that phrase "partypooper practical boring person" because that's me hahaha. I haven't notice a huge change in my electric bill and I have 4 top-down warmers that I turn on every day.