We are mostly focused on top teams but I think West Ham is starting to look interesting. They've got Joe Hart in the goal, got Zabaleta in defence so with Ogbonna they look like it will be solid defence line, they are after N'diaye for their midfield improvements but already with Feghouli and Lanzini it looks pretty decent, and up front they've got Arnautovic and will most likely get Chicharito in a few days. They seem like pretty solid team to cause problems even to the teams running for the Premier League title. They can take place in the table of Everton without Lukkaku. I can see them being just behind the top 5.
We're all guilty of overlooking teams that build up quietly. You're on the spot with West Ham, they've got a base to build on and fight for a Europa spot. Everton has also been flexing their newfound financial muscle and must be quietly eyeing top 4 with some eye catching buys.