I'm actually a big fan of sticking to the stock EQ plugins, especially ReaEQ by Reaper which is the DAW I use now.
I find that relying on my ears rather than constantly fiddling with knobs and settings helps me learn and understand the production and the process of EQing better. That being said, when it comes to treating live recordings, a basic EQ may not always cut it. So, I turn to Dynamic EQ, which helps control things in a much cleaner way instead of scooping out a whole part of the frequency spectrum all through the track. My all-time favourite plugin for this purpose is Nova by TDR, and the best part? It's completely free! TDR has some other cool free plugins that work amazingly. Definitely worth checking out.
Sticking to the basics has really helped me hone my production skills, and now I feel a lot more confident using any plugin since I know better what it's doing to my sound.