The ones I’ve now marked with are typically easy to open remotely, and usually easy to qualify for or get sufficient address proof to open an account.
For N26, you can read how to open here: https://nomadgate.com/open-n26-account/
For LHV there are some tips in this article, but it requires travel to Estonia: https://medium.com/nomad-gate/estonian-e-residency-ultimate-guide-banking-taxes-cc27fe39c368
If you live in the EU then N26, Bunq, Monese and Revolut are all easily opened using their respective mobile apps.
If you live in US, and have a Social Security number, then Charles Schwab, Capital One 360, and Simple can all be opened online (while in the US or using a VPN with a US server).
Getting sufficient address proof to open a Monzo account is quite easy, or at least it used to be. I’m not sure if they have or will become more stringent after launching their current accounts.
If you live elsewhere then LeuPay is probably the easiest to qualify for.