Goodrow surprisingly only spent around 100 games in the AHL (maybe closer to 130 doing eyeball math) and didn't seem to take the next step until his last season here. Other than that he was a flawed 4th liner.
Kipper under 100 in 3 seasons, Toskala spent a good amount of time around 150 but was never better than a journeyman backup, Cheechoo another one I'll give since his numbers can be seen going up as he spent more time in the AHL, Ehrhoff right around 100 games over 2 seasons with 80 coming in one season, Goc spent basically two seasons on the AHL team and you can see his numbers go up (not much), Murray is another one I'll give you, Demelo was awful with the Sharks and I fully give the Sens credit for him, Gourde spent less than a season with the AHL Sharks, I'll give you McGinn but again replaceable third liner, Greiss you are right, Stalock I got confused with Dell and thought he was the undrafted one that came up through Allen but journeyman backup, Irwin is and always was awful, Wingels spent under 100 games in 2 seasons with the AHL.
So basically Sommer developed 2 journeyman backup goalies, a flawed top 6 winger with an excellent shot, 3 replaceable third line players, and a 1B goalie in like 20 years. The most recent of these being in the early 2010s. Yes you can say that he had a hand in all of these guys development but then you have to give credit to every single U10 coach they had growing up and every single trainer they've ever had. Sommer is not someone I want around the young guys coming up right now. Even a blind bird can find food if it tries enough times.