As far as I can see, Proxmox VE is currently only partially configurable through community provided Ansible modules. (See below)
Inventory Plugins:
proxmox
Modules:
proxmox
proxmox_domain_info
proxmox_group_info
proxmox_kvm
proxmox_nic
proxmox_snap
proxmox_storage_info
proxmox_tasks_info...
