Oulare, 19, has been on the books of Anderlecht, Lille and Standard Liege already, but had made his name with Club Brugge.
He may have only nine professional goals to his name, but Oulare has had a growing reputation in Belgium, even earning comparisons to compatriots Romelu Lukaku and Christian Benteke.
At 6ft 5in, Oulare certainly possesses similar athletic attributes, and is seen as a very raw striker - just as Lukaku and Benteke were when they arrived in England.
Unsurprisingly, Oulare had attracted interest in his signature, and whilst it was Watford who signed him on deadline day - as confirmed on their official website here - they had rival Premier League clubs monitoring him too.
The Sun report that Aston Villa were looking to sign the giant teenage striker, but chose to look elsewhere due to concerns over his ability to make an instant impact in England.
"Tim Sherwood was looking to take Oulare, 19, to Aston Villa but pulled out because he felt he was not ready to go straight into the Premier League," the report stated.
Having already landed strikers Rudy Gestede and Jordan Ayew this summer, manager Sherwood possibly didn't feel that he didn't have to take such a risk on Oulare - but now, Villa fans will be keen to see just what they have missed out on when he takes to the field for Watford this season.