I've been very happy at KnownHost. Their support is fantastic. My only complaint is that their TTFB can be slightly slow from time to time on our VPSs but I'm just overly OCD about adding 50ms or whatever it is.
+1 for cloudways as well. Moved from digitalocean direct (as lack of support was frustrating) and they are great. Been looking at amazon lightsail, but it looks like they have no support (other than documentation)
Late as an answer for OP, but FutureHosting is a solid provider.
I assume that "managed vps" means looking for peace of mind and FH delivers. Had a VPS there for 3 years, zero issues, great support (moved away only because my main provider got me a great deal on a dedi).
Two caveats on FH:
1) I have no experience with their standard managed VPS, I used an Hybrid -- looks like there's quite a difference.
2) The "free cdn" is (or at least was) utterly useless because it has no SSL support (unless they added it recently).