Fastmail is probably the front runner. The cost which is maybe $132 a year seems a bit much but doable. They also do not support PGP and WKD. The namecheap premium plan would we would be $72 a year and even less with the current promo. They also have a cpanel mail solution too which is even less. Similarly mxroute is about $49 year for more too and seems like it may be run by people with similar attention to detail.
I agree though that Fastmail is a good choice and a more define long term reputation for email.