Yes Rashford hopefully ends up as a striker after Zlatan leaves and if Lingard was the same age as Rashford, you could give him more leeway but he isn't and sorry but Lingard hasn't stood out tracking back either. What a winger should be doing is taking on people and putting crosses or balls into the box, which is my biggest criticism of Lingard, he doesn't do it.
PL:
As many (2) assists as Zlatan & Herrera, in 582 minutes (Zlatan 1530 & Herrera 1189). One more than Mata.
1.6 shots per game (more than Martial & Rashford, as much as Rooney & Mkhi).
1.7 key passes per game (Rooney 1.4, Mkhi 1, Martial 0.9, Rashford 0.4).
3rd best pass %, bettered only by Smalling & Mata.
More crossed per game than Rashford & Martial, as many as Mkhi.
As many through balls per game as Mkhi & Martial.
17 created chances. Rashford 5, Martial 10, both have played more than Lingard.
Europa League:
Joint top goalscorer (2) with Pogba (465 minutes), Rooney (355) and Zlatan (358), Jesse's played 166 minutes.
Only Rooney has more assists.
More shots per game than Martial, Rashford, Memphis and Rooney.
Better pass % than Martial, Rooney, Mkhi, Rashford
I'd say that in terms of producing something on the pitch, Lingard has easily been as good, or better than Martial, Rashford and Rooney.