31st (tie) in PPG. He's also 19th in goals. He's 17th in ES goals and 25th in ES points, while only 26th in ES TOI (among forwards), 22nd in PP goals and 17th in PP points, while 19th in PP TOI.
Of the 20 players with more points, only one (Huberdeau) gets less ice time per game.com
Of the five you listed as comparable, three had more points and two had fewer, so I think that range isn't bad.
Among just right wingers, he's fifth in most offensive categories, behind (usually) Rantanen, Marner, Pastrnak (the only one with more GWG), and Kucherov, while being the only one playing on the second line. Their respective centres are MacKinnon, Matthews, Bergeron, Point, and Tavares (one of these is not like the others).
Having said all that, I think 8.5 - 9M is reasonable, but with Marner, and Matthews, and especially Tavares all being overpaid, I can see his agent justifying more.