The Newcastle United loanee put in an excellent performance v Hibernian at the weekend.
The Aberdeen front man would be worth a punt for Leeds United.
The Scotland player recently completed a move from Aberdeen to Norwich City for an undisclosed fee.
Rangers offered Scottish Premiership rivals Aberdeen £300,000 for Kenny McLean but the midfielder will join Championship side Norwich City instead.
Rangers had been linked with trying to bring Kenny McLean to Ibrox.
Wolverhampton Wanderers will have to smash their transfer record to tempt Championship rivals Norwich City into the sale of James Maddison.
Rangers are said to have hoped to bring McLean to Ibrox on a free transfer this summer.
Newcastle United youngster Sean Longstaff is the latest rising star linked with a bargain move to Scottish Premiership giants Rangers.
Celtic and Rangers need look no further than Pittodrie for proven quality.
Rangers are reportedly still pursuing 2018 deals for Kenny McLean and Jamie Walker.