At the moment, most of my critical stuff is hosted on MDDHosting's Plaid Reseller plan, with a backup VeeroTech reseller hosting account (links to my reviews).
I have some less-critical stuff hosted on MyW reseller server in Germany (Hetzner).
For emails, I'm using MXroute, (again, my article on that service), and they've been rock-solid for years now.
Backups are mostly on a Hetzner Storage Box, and Cloudflare is set up in front of it all.
Works fine for now (knock on wood). Quite flexible, scalable, and with enough redundancy for me to sleep well at night. 🙂
@Amadex - Mailgun's deliverability has been a hit-and-miss for me years ago. I see you're using it, so I suppose they've fixed their service.