Check out Mullvad. You can pay with crypto (monero included), and you don't even give them an email. You just get an access id number, no password at all. Works quite well. They also have a setup where your entry server is different then your exit server (you can pick each) so someone watching your traffic can't match input to output. That's about as anonymous as we can realistically get.
Majority of VPN companies have their IP ranges known to banks and financial institutions through 3rd party services that scan such IPs. Some IPs from VPN companies will come up categorized as Data center (same as renting a server and setting up the VPN yourself). Other VPN companies could give you a residential IP so it will be less obvious to the banks software that you are routing your traffic. The issue with either option is someone using the same IP as you might do malicious activities or open multiple accounts on the same bank/EMI for example so when their account gets banned for whatever reason... they will ban yours too or at least flag it for inspection.
There are countermeasures for fingerprinting. Mullvad browser, vanadium instead of chrome etc.
It's defacto just chromium that is always in incognito mode. It resets to zero every time you start it. It stores no history, logins, etc so keep that in mind.
Question is what does amiunique.org use in their fingerprinting? If it's using IP as well then you are a unique configuration to that IP and thus 'unique', but otherwise you may well be the same as every other mullvad browser user.
To outline from my previous post, banks will detect you are using a VPN and they do have that as a risk flag - some as a big one others as informational all depends on the policy. If you still insist on using a VPN for banking you should enable it only when banking and no other activity is done. When you are done, switch to other VPN. I don't recommend this but many VPN providers have ability to split-tunnel meaning have it enabled for only specific browser or application or reverse disable it only for specific browser or application.
I personally wouldn't use such browsers. A hardened Firefox is much better choice (such as Tor Browser), I wouldn't call anything chromium-based privacy focused at all. In either way none of these browsers whether combined with a VPN or not including Tor Browser can achieve foolproof solution. Stopping leaks, connection drops & more is needed at minimum and that can't be achieved entirely on a browser level.
Mullvad turns out is actually firefox not chromium. Tor brings it's own set of problems - you don't know who is running the exit nodes.
Tor wasn't suggested but rather the Tor Browser or rather its anti-leak configuration. The point I was making was you shouldn't blindly trust a company to do both your browser and network protection. If you seek anonymity on a browser level Tor Browser is much better choice than Mullvad. On that note all of Mullvad nodes as well as few other major VPNs are actually very carefully watched. Just because you shift traffic from point A to E to reach H that doesn't mean they can't or don't observe transit points B, C, D or F and G. In many cases they don't even care, these are simply used as starting points for investigations and parallel constructions. The days of achieving anonymous connections through a one-hop VPN and maybe a simple proxy on top are way gone.