The West Ham United player rewarded his 0.5 per cent ownership with a 19-point return, his best of the campaign.
Fornals was among a number of overlooked midfielders to deliver devastating points hauls in Sunday's season finale.
The Ivorian recorded five of his 10 goals for the season in his final three outings.
He has two goals and three assists in his last six appearances.
Big-hitters Sadio Mane and Kevin De Bruyne (both £11.8m) returned to top form.
De Bruyne claimed 13 points in his first appearance since Gameweek 30, thanks to a goal and an assist against Everton.
Manchester City team-mate Sergio Aguero (£10.3m) was one of three premium-priced forwards to return double-figures on the final day.
He emerged from the bench to score twice in the 5-0 win, his last appearance for the champions, and score 10 points.
Jamie Vardy (£10.2m) and Harry Kane (£11.9m) also delivered big scores in their head-to-head at the King Power Stadium.
Vardy converted a pair of penalties, taking his tally to 15 goals and 14 FPL assists for the season.
Kane secured the Golden Boot with his 23rd goal of the campaign.
The Spurs striker also supplied an assist to claim 10 points, his ninth double-digit return of 2020/21.
But his final-day exploits weren’t quite enough to overtake Bruno Fernandes (£11.3m) as the top-scoring player in Fantasy.
Kane ended on 242 points, his best-ever season, just two points behind the Manchester United playmaker, who had been rested on the final day.