Hi,
you can set the DRS and HA settings for each VM individually in the cluster settings. In the vSphere C# client there are different tabs for HA-VM-options and DRS-VM-options.
In the new web client those settings can be found on one tab: manage -> settings -> VM Overrides
Set the DRS automation level and the HA Restart Priority to disabled for those 2 VMs. Also pick Leave powered on as HA Host Isolaiton response.
Regards