Yeah we did a pretty thorough review this year in the hopes of ditching VMware... Landscape is pretty bleak tbh
Only one I would maybe like to give a PoC would be nutanix. unfortunately red hat virt is being deprecated soon, to be replaced by ovirt which is def not prod ready
Well our red hat account manager said OpenShift virtualisation (what I meant by ovirt and why I included it with Red hat) was their replacement for RHV.
They did also say all the rest though. That said in NA there are a couple of huge esxi to OpenShift virtualisation migrations we have white papers about. Our testing just found too many missing features compared to vmwares offerings