Quoting: GM_Todd
He is definitely a top 20 forward in the league, depending how he is week to week he is a top 10 player
He probably had a Top20 season this year but overall there's no f*cking way he's Top20 forward.
Let's see, on the top of my head I can think of McDavid, MacKinnon, Matthews, Draisaitl, Crosby, Barkov, Bergeron, Stamkos, Point, Aho, Zibanejad, O'Reilly, Kucherov, Rantanen, Marner, Pastrnak, Stone, Huberdeau, Gaudreau, Panarin, Marchand and Kaprizov who are definitely better than Miller is. There's also those who can be arguably considered better as well such as Kane, Ovechkin, Pettersson, Tkachuk, Connor, Robertson, DeBrincat, Tarasenko, Kopitar and even Couturier, although he missed majority of this season with an injury.