The Belgium international has scored 12 goals and has eight assists this season and has been nominated for the PFA Player of the Year award for the third season in a row.
Hazard also tops the Premier League's EA Sports Player Performance Index (PPI), far ahead of any other player.
"It's very hard pointing out who's the best here or there, especially here with so many good players. But Hazard has been so consistent and he deserves to be considered as the best player in England," Oscar tells Goal.com.
"In my opinion he is the best player in the Premier League at this moment."
The Blues are odds-on to win the title this season and need 12 points from their last possible 21 to guarantee the trophy heads to Stamford Bridge.
"If we keep this winning mentality I can't see why other stars can't rise here," adds the Brazilian.
"Obviously we [Chelsea] have other good players like Willian, he is only 25, or Diego Costa. We still have room for improvement."
