Windows file server clustering - physical 2008 Ent R2 and 2012 or 2016 VMware VM

I currently have two physical Windows 2008 Ent R2 file servers clustered. I plan on either adding a third VMware Windows server into the cluster or replacing one of the physical servers with a VM. Due to lack of drive space, etc upgrading the physical server(s) to 2012 or 16 will be a challenge - 2019 out of the question. I've been searching around to determine which OS versions are cluster-able? 

These servers are also DC.

Phy                 VM

2008 >>>> ? 20xx

2012 >>>> ?  20xx

Thoughts/Advice 

Thanks, 

Milty 

milty60