Which virtualization system you recommend?

Hello everyone,
I'm looking to purchase a dedicated bare metal server from OVH to set up a VPS node, but I'm not sure which virtualization software to choose Proxmox, SolusVM, or Virtualizor?
I'm new to this but have a bit of knowledge. I want to sell VPS services similar to what https://satisfyhost.com/ offers, where they use KVM, so my focus is on KVM as well. I’ll also need official support sometimes, so good customer support from the software company is really important for me.
Any suggestions or recommendations would be greatly appreciated! Thanks in advance.