Nuno would be a good pick, I reckon.
EDIT - just seen posts saying its underwhelming. I don't know how? Nuno is a good manager. He's just been screwed by Covid. Had the longest season of any team the season before this one just gone, played nonstop after lockdown and then had arguably his 2nd best player taken from him last season before his undisputedly best player getting a freak injury. He's probably never going to the very top, but he is a damn good manager, and for a club like Everton, I can't think of many (if any) who are a) attainable and b) better.