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Not that Pro stems are anywhere near good looking
Well, there's your trouble, and at least half the reason I was being snarky; if you're bothered by aesthetics over function, then there's really no point asking us to help, since we cannot guess what will satisfy your taste.
You should also bear in mind that ±2° is about ±3.5mm height change on a 100mm stem, which might matter if you knew where every manufacturer was measuring from, but you don't. Differences in stack height and measuring references can make more difference than that.
gbj_tester-
Maybe I should have started with this:
I'm looking for a 110mm equivalent for my 100mm 10° Thomson X2 that's been slightly too short. Also I think the clamp design is prone to fail.
I've tried 6° stems but I think below 10° is really the way to go. Changing stack height by moving spacers is not an option as it's fully slammed with your head set cover
bibimbap
Just my thought, but apart from Pro there doesn't seem to be much more around 10-12 degrees that also look good. Not that Pro stems are anywhere near good looking.