The Brown have #1 and #12 though. They could easily draft Garrett and one of Tribusky/Watson/Kizer/Mahomes. It's not "draft a QB or draft Myles Garrett"... they can, and probably will, do both. They can likely package #12 and #33 and move back into the top 5 in the draft (according to the draft value chart that is an "even" trade, although obviously that depends heavily on if the team at #4/#5/#6 is willing to trade)
Now, one of the common criticisms of this draft is that Trib/Watson/Kizer/Mahones are kind of mediocre draft prospects. Okay, maybe that's true. But Jimmy Garoppolo was the 5th quarterback taken in his draft class, and he lasted until the 62nd pick in the draft. It's not like he was a hyper-elite prospect either. Sure, he's had a couple of stellar games, but his sample size is pretty small. (Remember how good Matt Flynn -- who holds the Packers' all-time record for passing yards in a game [480] and touchdowns in a game [6] -- was in his limited time in Green Bay?)
No, I'm not saying I think Flynn was as tantalizing of a prospect as Garappolo (but there are parallels). Yes, I realize that Garappolo's stock is higher than when he was drafted. But overall, I think people dramatically exaggerate the leverage the Patriots have. The Browns have a substantial amount of ammo and resources. If they like one of the QBs in this draft, there's a good chance they can nab him and Garrett.