#2 Carlo Ancelotti
The manager with the best CV on this slide show, Ancelotti is rightly considered one of the greatest managers in world football in the 21st century. He's found success wherever he has gone: 2 Champions League wins at AC Milan; the EPL title with Chelsea; and another Champions League win with Real Madrid.
There's not one role that he's taken which could be deemed as a failure. If Ancelotti replaced Wenger, it would be the safest choice for Arsenal at the moment: perhaps a manager who virtually guarantees success is what's needed after their recent struggles. Ancelotti is well-known for allowing his players to express themselves; he's not one for using punishing tactical systems.
His favoured formation (4-3-1-2) which worked for him to such great effect during his time at the San Siro might also suit this Arsenal team: the idea of pairing Alexandre Lacazette with hitman Olivier Giroud with Mesut Ozil in the playmaking hole is fascinating.
Ancelotti's recognition would also help to attract top players to the club, something which they've struggled with recently, losing out to their league rivals in pursuit of world-class talent.