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Easy to open online non-Euro personal bank account

The Atlantico Bank in Portugal: I think it's around 9EUR/month. You'll have an EUR account but can ask for a USD account as well.

DukasCopy (CHF and USD) in Switzerland: free if you hold 40 "dukas coins", which is a crypto token they mint, that's around 50~60USD. No maintenance as long as you keep those coins (may have changed, it's been a while since I used the account).