WP Google Authenticator
I wouldn’t even overthink adding this plugin to your WordPress site. It’s no hassle and will add an extra layer of security to your website. An alternative could be Rublon, which works in a similar manner, but we usually use WP Google Authenticator.
Login Lockdown
For an extra layer of security, we recommend installing a plugin like Login Lockdown, that prevents automated login requests from firing a gazillion login attempts. If some IP range does a surplus of attempts, the login function is disabled for all requests from that range. For more details, check Login Lockdown in the plugin repo.
Any image compression plugin
Yes, I would like to name just one. But the truth is that it depends on your website what plugin works best. We have used Smush, tried EWWW. Kraken.io has a plugin and ShortPixel has one. And has anyone tried the premium Imagify? I would really like to see a comparison for these plugins from an independent, image-heavy website. For now: pick one and use it.
Ninja Forms or Gravity Forms
Both are great plugins to create drag-and-drop forms. Both provide an option for conditional logic and are really easy to use. If you have a form on your website, and any website that has a contact page should have a form, I recommend using Gravity Forms