Per Paul's question about EV onion certs specifically: the public Certificate Transparency logs are pretty great. They allow some audit trail on cert issuance, revocations, reissues, etc. -- and the data includes the "browser-friendly" .onion EV certs that DigiCert is issuing.
https://www.certificate-transparency.org/
Comodo has a pretty decent search interface for CT logs that aggregates the various log servers, so you can search for things like "%.onion":
Looks like that search result list also includes subjectAltNames and things like that for multi-domain certs, which is pretty nice.
But this'll only be for the few CA-issued EV certs that exist, not the common cases of self-signed certs or onion sites serving TLS with their clearnet domain cert. (Those two cases seem to be the bulk of the older wiki lists and what Juha reported.)
Best,