The on-loan Aston Villa striker found his feet in Monday's dramatic 3-2 triumph at Derby after a difficult debut against Birmingham and an indifferent appearance at home to Southampton on Good Friday.
And Keogh, who grabbed a brace at Pride Park to put Wolves within touching distance of the Premier League, insists it would be great to see Harewood sign on the dotted line and wear the gold and black of Wanderers next season.
The Irishman told the Express and Star: "He could be a key player for us. He's got Premier League quality, he's a great player to have and he'll carry on making himself a nuisance in the last few games.
"He wouldn't be playing for a club like Villa if he hadn't got that quality, so yes (I'd like to see him here). The gaffer has been very good with some signings and I'm sure he'll make some astute ones when he needs to as well."
Harewood himself reiterated: "I don't know what is happening at Villa, but it's here that matters for now and I'm just happy being here until the end of the season and then I'll start again."