Hi, maybe my info can help
there are 5 types of EQs, Graphic, Parametric, Shelving, Linear Phase, Dynamic
dynamic EQs with the rest of the bells and whistles swapping between analogue digital analysis etc are very diverse, this idea has been ported over to AI technology as we can see with Sonible Smart EQ., regardless of this the questions becomes what applications you need the specific eqs, during the audio capturing stage after a preamp, before a guitar as a boost and or to scoop, between a guitar pre amp and amp fx chain, bus-mastering etc etc Yet all those applications i mentioned dont even include coloring…so while its easy to suggest one eq for all its never the solution once you realize you need to tweak something inside the mix.
fabfilter Pro EQ has def been the top, i dont use it as much as others but if im in trouble i do.
waves f6 and h-eq are something to check out
i like focusrite red stuff on guitars, no one agrees but i get the neve-ish tad in their,
PA or UAD Maag 4 has been my fav for boosting synths, api stile boost eq making the synths brutally aggressive.
PA Amek, Kirchoff, are my fav PA aside maag 4
Kuch Clariphonic dspmkii is interesting
uad pultec
eventide split eq is amazing
Oeksound sooth2 is effective And like fabfilter a must
Oxford Dynamic
then you have match eqs,
-fabfilter does a good job,
-eventide ??
20-80hz sub bass
100-250hz boom
200-300hz body
700hz strings
2-5k hz presense
10k hz air
maag and split eq adds an air type function
based on all this info, a fraction nerdy bunch info that is, its enough to work with even if you have ears suffering from fatigue …and as mentioned over and over here most eqs built into daws like Logic, reaper, pro tools are usually very good and enough.