Blanc would take the job and it would take 3 weeks before the team plays a totally different style.
But Arsenal won't do it. They'd rather hire Vieira.
Let me tell you about Vieira : you'll get some defensive bunkering that STILL fails to bunker down. It's Arteta Part II. No scoring except for a single player offensive prowess (Gouiri at Nice). He has zero offensive scheme.
Hiring Arteta was stupid. How many rookie coaches do great with a big club? Guardiola and? That's about it. And even then Guardiola learnt the ropes in lower levels and had an allstar team to play with.
In France, Julien Stephan (Rennes) is a bright young coach. But it'll take time before he figures everything out.
Anyway, among L1 names, Blanc is the obvious one (Nice are interested, Nantes as well) but hasn't coached in years and will be without his historical assistant (Gasset, now Bordeaux coach). Galtier is the big one, but he won't leave Lille mid-season. Tuchel can go, but United are after him and again, won't leave mid-season unless fired. Then there are a couple of obscure coaches to main media (Lens, Brest) who play nice football, but no way will Arsenal even look at them.
Frankly to me in France, Blanc is the best choice. He plays possession football, he took a Bordeaux team to L1 win, CL 1/4, top of their CL group with Juve and Bayern (unbeaten with 5 wins and 1 tie) with champagne football. Took PSG and never lost before a 1/4 final (twice lost on away goals) while setting every single L1 record and winning the treble 3 straight years (never happened before or after). This guy would be perfect.
But I'm guessing he's not a smart enough hire for Arsenal.