George Miller reached double figures for the season with a brace either side of a brilliantly executed half-volley from Harrison Biggins to send Rovers within two points of the play-offs.
Miller had Kyle Knoyle to thank for assisting his tenth and eleventh strikes of a fruitful first campaign in red and white.
Substitute James McAtee grabbed a late consolation goal for the Mariners, punishing a rare moment of poor quality from the visitors during an otherwise very strong display.
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6. Ro-Shaun Williams - 7
Perhaps the pick of the centre-backs. Made some important blocks and interceptions. Photo: Howard Roe/ahpix.com
7. Ben Close - 7
Got Doncaster ticking from the base of midfield. Photo: Liam Ford/AHPIX LTD
8. Harrison Biggins - 8
An all-action display in the centre of the park capped off with an exquisite strike for the second goal; a half-volley from the edge of the box. Photo: Bruce Rollinson