Think Michel from Girona would be a good shout. Done a fantastic job with them this season getting 3rd in La Liga and has them playing great football. And given he's already managing a CFG club it's hard to imagine Michel wouldn't be one of the top candidates for the job.
Off the top of my head this would be my 10-manager short list:
Michel (Girona)
Roberto De Zerbi (Brighton)
Xabi Alonso (Bayer Leverkusen)
Eddie Howe (Newcastle)
Marco Rose (RB Leipzig)
Kompany (Bayern)
Oliver Glasner (Crystal Palace)
Thomas Frank (Brentford)
Andoni Iraola (Bournemouth)
Zinedine Zidane
But regardless I have complete faith in Khaldoon/Txiki/Pep/Soriano to pick a worthy successor that will keep us competing at the top of the prem.
Also, I know a lot of us banter Arteta on BM but he's turned Arsenal into a very formidable opponent and it'd be scenes if we took him from Arsenal. Didn't put Legohead on my shortlist though as I doubt that would ever happen.