Of the guys you list, only one was a power pitcher in Verlander. I know the others had heaters early on, but Santana, Greinke and Halladay were as much about location, movement, depth of arsenal and command as they were power. They had an arsenal that would age well. Verlander and Sale are different beasts. Verlander was only okay when his velo dropped. WAR still of 3-ish but he saw a 2-3 mph drop in his velocity. After moving to Houston, he regained his power. Fishy as hell if you ask me.
Also, Verlander is on his way to another 200IP season which will be 12 of the last 13 for him. He really hasn’t had an injury like Sale had where immediately thereafter he lost his heater. CC did (bone chips in elbow). Sale is a power pitcher. Mid to high 90s, power slider, okay change. Wait, a lefty with a good fastball, power slider and okay change? Who does that remind me of? (Hint, CC) He doesn’t really run anything in on lefties. He doesn’t really rely on impeccable command in the zone but he can throw strikes. He’s a good morning, good afternoon, and good night kind of pitcher. You can’t challenge guys without big velocity and he’s learned that this year. If he drops further in 2020, then it’ll be pretty apparent that he’s following the CC path. They’re very similar.