Lastly, if thickness is your friend, farmhouse potholders can be made to have lots of thermally protective padding. This slab of a potholder is amazing.
The full pattern is on https://yarnandchai.com/ blog:
Easy Double Thick Textured Crochet Square Potholder
Crochet Cactus Potholders
Dutch Skies Potholders
Crochet Thick Potholder
Beginner Decorative Crochet Potholders
