Same problem. No other ways to verify, just my FULLY CORRECT PASSWORD, so Google has decided I’ll never get to access my old account again.
I posted about it on the Google forum and was told by a self important community person that it is my fault for not logging back into that account to set up backups.
Happy to switch off Gmail now, but it won’t get my old emails with bygone friends and family back.
My fault for expecting my password to get me into my account. Fuck Google man.
Peppy!