-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
All of the hypervisors you've mentioned (Proxmox, ESXi, XCP-NG) are capable of PCI passthrough, so it really boils down to which one you're comfortable with. ESXi is feature-limited regarding backups (unless you acquire a paid vSphere license or choose to use ghettoVCB).
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.