Leicester City
Leicester is a club of a similar size to West Ham United, and if Claude Puel doesn't prosper at the club, Wenger may be another person in the running here.
Akin to West Ham, they have well-established players as well as sound up and coming talent. As we all know, Wenger could get the best out of the latter, such as Harry Maguire who excelled for England in the Russia World Cup. Others such as Ndidi and Ineacho could blossom in Wenger's free and open style.
Vardy is a player whom Wenger wished to sign whilst at Arsenal, and Vardy could do well in Wenger's naturally open style.
It could be a viable option, for the 2016 PL champions. Wenger finished second to them whilst at Arsenal incidentally. Back then, Leicester was known for the fast-paced counter-attacking football, and this could be reinvigorated somewhat should Wenger take charge.
This is another left-field choice, but then a mid-sized club like Leicester could be suited to him.