If you're going to use it as a workstation, are you not going to just use Gnome, KDE, xfce, etc.? I'm still pretty confused about what your actual use case is, since you haven't explained it.
I mostly use win11 as my main os, and using proxmox as a base lets me properly use things like pihole, homeassistant, nextcloud, and other such services, because Windows really sucks for virtualizing those.
And OS hopping is a lot easier when I have a backend like proxmox.
Want to try arch but not sure if nvidia/wayland support is there yet? Roll up a gpu-p'd VM for it, instead of wiping the entire disk.
I assume you're dual booting, otherwise I'd just say use the web interface from Windows.
But I don't see any reason here that you can't just use a standard desktop on top of Proxmox. Or, for that matter, just using plain old Debian and qemu.
If you're not dual booting, and you have Windows and Proxmox, then you have two devices and you can use the Proxmox web interface from the other and be done with it.