There's an existing e2e suite (very bare bones) in the must-gather-operator repo, to begin. https://github.com/openshift/must-gather-operator/tree/master/test/e2e 

We should look into running it on the CI as pre-submit jobs for PRs.
Once there, we can refine per se Keenon's list https://docs.google.com/spreadsheets/d/1g2xF7q8Jdvf0TticG6vIVAEyINgp4sUI90MnAz5eo8s/edit?gid=1134510471#gid=1134510471&range=B10:B15.
 
 
Refer: 

1. https://github.com/openshift/release/blob/master/ci-operator/config/openshift/cert-manager-operator/openshift-cert-manager-operator-master.yaml 

2. https://github.com/openshift/release/blob/master/ci-operator/config/openshift/zero[…]anager/openshift-zero-trust-workload-identity-manager-main.yaml