Mr. CompletelyIf you just learned (or are just now learning) that Sticker Mule is run by a hardcore Maga guy, and would like an alternative, may I suggest Sticker Ninja? They are a small but mighty Portland local company and their quality is much, much better than Mule anyway. Their glitter stickers are especially great. They have actual humans doing careful prepress work on your design - one of them is a friend of mine and she's a real pro.
Nick Poole@mrcompletely if you're closer to the middle of the country, I can also suggest Sticker Giant. I used to live within 20 minutes of their HQ and would pick up my stickers in person. They seem cool.
Ian Scott 
🐙@North @mrcompletely I interviewed with them for a job and can vouch for how cool everyone I talked to was