Dunno, I'd have to think of all of their feats and imagine what the baseline for Extraordinary Genius through skill would be. For Re: Zero characters with Extraordinary Genius, they usually have or are above characters with:
* Mastery over many if not hundreds or thousands of different martial arts or all martial arts (in their world)
- At least what is equal to centuries' worth of combat experience
- The ability to brush off an ability that messes with all five of the senses through skill alone
- Skills that are considered to not be achievable even in an "eternity" by characters who are already Genius level in skill
They're pretty much the only Extraordinary Genius skill characters I'm aware of so maybe they're not the baseline, but they set a
very high bar for it.
Edit: I think Yoda, Dooku, Mace, Anakin, and maybeeee Obi-Wan (probably not) could meet the centuries worth of combat experience if we scale from Yoda. It is highly likely they could meet other criteria too since I haven't compiled the skill feats, might be some crazy feats and statements I have yet to see.