The Wordpress plugins that I use most of the time are WordFence, Yoast SEO, WP Super Cache, TinyMCE Advanced and some parts of Jetpack. I sometimes will use some others based on what needs I have for a website but these I listed are usually on all of my WordPress sites.
On most of my websites I use All in One SEO, Wordfence, Jetpack, Wp Rocket and a couple of various plugins that fill a need for each particular website.
I used to do a lot of testing and trying out many different WordPress plugins to see how well they performed and how well they did the task I needed them for. Lately I have not had the time to do that but I hope to get some time to do that again as I learned many things and got some good comparisons between similar plugins.
Cache Enabler. Fastest cache from what I've tested.
CDN Enabler. Makes using a CDN super simple.
Optimus. Plugs in with Cache Enabler to deliver WebP
Publicize by Jetpack.
As well as a security plugin.