I’ve had a very good experience with virt-manager for several years.
It includes spice as the default VM viewer, to get clipboard sharing and auto-resize install the following in the guest:
apt/dnf/yum install spice-vdagent
Restart the vm (thanks @esbeeb) and in the spice window check: view > scale display > auto-resize…
Note: auto-resize doesn’t work on some X11 desktops, guide to get around that here: Auto resizing Xfce and MATE resolution in Spice (VM guide)