powermonkey Gsuite is the answer

Upgrade your gmail to gsuite, (google business account), then you have people to call, 24 hours a day. They can get you back in, and the hackers out of your account. On top of that, you can use your own domain on a gsuite account, thats another backdoor back in to your gmail main account (use one that got a 24h call service). its possible to transfer a youtube channel to another gmail. Gsuite gives you access to an admin console. Redirect all emails to a secret email account only you know, redirect from your domain and google at the same time. Be creative, and don't use a free solution as your main account.