#3 Antoine Griezmann (Atletico Madrid)
The signing of Griezmann to Chelsea would be a controversial one, given Diego Costa recently transferred the other way to Atletico Madrid, but Griezmann's world-class status would be worth the effort.
The Frenchman decided to stay on at Atletico over the summer due to their transfer embargo, despite known interest from Barcelona.
That's now come to an end as with Costa available, his presence isn't so keenly needed anymore. Barcelona has signed Ousmane Dembele and Phillips Coutinho in the meantime, meaning it is unlikely that they'd splash more cash to secure Griezmann's services now.
The player, then, could be tempted to try his luck in English football and Chelsea would be the best destination for him. The thought of Eden Hazard and Griezmann playing in the same team would strike fear into any Premier League defense. Their trickery and dribbling ability combined would be incredible to watch.
Another positive aspect of Griezmann's potential signing would be his versatility: he's effective playing anywhere across the attacking positions, equally good as the main striker or the playmaker.
This would allow Conte to play him beside Alvaro Morata as opposed to pitting the two players against each other for 1 role, with the Frenchman dropping deeper to collect the ball and combining with Hazard and Willian.
If Chelsea wants to reclaim their league title back next season, they need to be signing world-class talent and a forward line of Alvaro Morata and Griezmann would be a great start.