There are some plugins I use on most sites that I run.
Akismet – is by default installed. Deals with comments spam.
Gutenberg (Block Editor). The new editing experience in WordPress.
Autoptimize – Optimizes the site.
Email Encoder – Protect Email Addresses Full site protection for your email addresses from spam-bots, email harvesters and other robots.
FileBird Lite Media Library folder plugin.
Koko Analytics A light weight and really good stats plugin.
Discourage Search Engines Notifier Adds an icon to the black top admin bar letting me know if this setting is on or off.
Imsanity Makes bit images smaller.
Caldera Forms (Has was discontinued December 2021. I am looking for a new Forms plugin that can replace Caldera.)
Transposh Makes it easier to add another frontend language.
Other interesting plugins
Multiple Themes One can add multiple themes to a site.
Grow Social Social sharing buttons.
WP Activity Log Shows the activity on your web site.