Sure, at least 5, but it's all about our ability to sign them. After Ronaldo, I won't exclude signing a top star, however, I am aware that this summer most of these players are not probable signings.
I'm thinking of players like Jorginho, Verratti, Kante, Pogba, Kroos, Gundogan... I'd even take a 36-year-old Modric for this following season.