After compare a lot of VPS from my point of view AWS is the best option, but when we read their TOS looks like they don't like at all the Crypto applications.
You should definitely avoid using Hetzner that publicly said they will terminate every activity related with cryptocurrencies.
I have developer friend who used various VPS servers for crypto related stuff and he didn't have any problem with Vultr and Contabo, but I didn't ask him recently if there was some changes.
It's best to read tos page before signing any contracts and talk with their support fo clarification, but i would check lowendbox.com website for good deals.