I am running 7.0.2D for vCenter and a mix of ESXi 7.0.2e and 7.0.1e across 2 clusters in the same vCenter. One of my backup vendors still does not support ESXi or vCenter 7.03 , plus to be honest I am in no hurry to upgrade.
Although for ESXi, there is no 7.0.2e or 7.01E ISO . You either need to download 7.02u2A or 7.01u1C and then apply the patch bundles. I am not sure why VMware never released proper ISOs for them.
If you're already on vCenter 7.x you can build a custom ISO with vLCM and export it to use for new builds. It will save you downloading earlier ISOs then the patch bundles separately