I would take Gregory in a second. No debate needed from me.
He is by far the most talented DE/OLB in the draft. Period. So the guy smoked a little weed. I'm sure at least 50% of players smoke weed, it's so glorified now in society, it's in music, movies, ect. It's legal now in a few states, with more states probably being added this year. I believe Justin Houston tested positive at the combine and he's hasn't had any problems. So you never know.
After watching this scout break down how ridiculously talented he is, you might be swayed too.
https://youtu.be/S8AdCCOD4iw