Choosing a safe encryption algorithm for SSH on CentOS

How to choose the best possible encryption algorithm for SSH on Centos?

Choosing a stronger encryption algorithm for SSH, than the default:

Regenerate a new host key using the ed25519 algorithm (ed25519 uses Curve25519 which has a high safety rating)
https://safecurves.cr.yp.to/
http://blog.cr.yp.to/20140323-ecdsa.html 

ssh-keygen -f /etc/ssh/ssh_host_ed25519_key -N '' -t ed25519

# vim /etc/ssh/sshd_config

Comment all HostKey lines, except for the key using ed25519:

#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key

Restart the sshd service:

systemctl restart sshd