Even if he was a surefire top 10 he is unlikely to be drafted very high playing in the Czech League unless he puts up Jagr like numbers. Like above PPG, which I'd say is highly unlikely. Guys like Rossi and Rochette came over and are already improving their draft stock. Canada is loaded for 2020 so it's unlikely Mysak can get into the top 10 going up against the likes of Lafreniere, Byfield, Perfetti, Drysdale, Barron, McCLennon, Guhle, Neighbours, Foudy, Jarvis, Sourdif, Coe, Schneider, Holloway. Let alone the other top Euro's like Holtz, Raymond, Gunler, Simontaival, Lundell and Hirvonen.
Mysak will have to have a damn good season in the Czech league to go top 10 against this crop.
Zacha was never really that great, just a big center. Pretty much the only reason he got drafted high. Zboril is a shutdown defender and nothing more really. Never really was anything more.