According to HPE the DL980 G7 does not support vSphere 6.5 or 6.7. The last supported version of vSphere is 6.0 U3. You're likely going to encounter driver compatibility issues, especially considering HPE is not likely going to provide updated firmware where there are new driver dependencies.
If you do opt to try to incorporate some sort of custom or adapted drivers into a 6.5/6.7 build, that could be interesting from an academic/lab standpoint. I wouldn't recommend it for production workloads though. Good luck!