If we can't get past Bilbao mid-week, i would personally love Lucho to get sacked right there and then. Best scenario: bring in Bielsa maybe like you all said, only as an interim manager for now, and see how we do with him in what's left of this season, maybe he can inspire the team to a right now unlikely CL trophy. Then act accordingly in the summer. Forgot about Sampaoli and Pochettino as viable options to come...would like either of them very much too! And Pochettino just might be ready to move on, especially if Tottenham don't reach top 4, then all of it could come crashing down (Alli sold? Kane?).
Tuchel and Klopp probably aren't realistic anyway, so it'd be between Valverde, Sampaoli, Pochettino or giving Bielsa and extended run, if he actually came in to replace Lucho mid-season but i find that highly unlikely. But i wouldn't mind Bielsa actually getting a season or two to prove he's still one of the best out there, even if he does come in after this season. If Lucho managed to get 3 whole years, we can give Bielsa 2, especially if no one of the main trio from upstairs don't come. Don't like Blanc personally, just seems he would have trouble managing this many egos, didn't impress me at PSG, and i've said my piece on Koeman already. I like Emery as well, but he's just starting at PSG, so i think that's as likely as getting Klopp.