In my estimation, an "ace" is a guy you know is going to win the game that day. I just don't think there are other guys like him out there. I think there are some very good pitchers besides him, but I don't consider any of them an "ace". Back in the day, I would have considered Verlander, Randy Johnson, Clemens, Maddux, Sale and others "aces". I may be missing someone from today, but that's all I have right now is Cole. I would likely have Ohtani on that list as well if he were not hurt. Strider might be one if he replicates what he did last year.