It has been a busy summer for West Ham in their first window under Julen Lopetegui, with the club splurging £123.4 million on a plethora of high-profile signings ranging from Jean-Clair Todibo, Crysencio Summerville, Aaron Wan-Bissaka, and Max Kilman. However, their best piece of business may end up being a free transfer, if Guido Rodríguez’s…