Permission denied (publickey) - Digital Ocean

This is definetly a duplicate but I went through as many of the other answers as I could, I posted on the Digital ocean forum first, and I contacted DO support, and still I cannot access my server.

I tried:

1. Used ssh-keygen and make a key called id_rsa3 (id_rsa works, but this is already taken). Adding the SSH key on creation to the DO dashboard via copy/paste. This method did not work. I destroyed the droplet and began again.
2. Recreated new keys and did ssh-copy-id -i ~/.ssh/id_rsa3 root@MY-IP. Then did ssh -v -i ~/.ssh/id_rsa3 root@MY-IP to test. Permission denied (publickey).I destroyed the droplet and began again.
3. Recreated new keys. Login into DO console and go to /etc/ssh/authorized_keys and paste in the public key that matches my local key. Then ssh -v -i ~/.ssh/id_rsa3 root@MY-IP to test. Still, Permission denied (publickey). Destroy droplet, try again.

4. Created a ~/.ssh/config and tried to get the droplet to choose the correct key. Might be some syntax problems here. It runs the config, but does not get the correct key.

   Host sinatra_app HostName 206.***.***.*04 AddKeysToAgent yes UseKeychain yes User root PubKeyAuthentication yes IdentityFile ~/.ssh/id_rsa3 IdentitiesOnly yes

UPDATE:Destroyed droplet and added new keys. It asks me for a PW even with SSH. If I changed the PasswordAuthentication no it will then say Permission denied (publickey). So this is where I am stuck now. With access but cannot remove PW.