The Browns should draft Wyoming quarterback No. 1 overall, a high-level NFL personnel executive told, and ESPN's Mel Kiper Jr. feels the same, according to his first mock draft released on Thursday.

The NFL exec, who told at the Senior Bowl in January of 2016 that the Browns would be set for the next 15 years if they drafted Carson Wentz, said "Allen is the best and it's not even close.''

He ranks him ahead of USC's Sam Darnold, whom most experts believe the Browns will draft at No. 1; and UCLA's Josh Rosen, whom many have the Giants taking at No. 2.

"I believe (John) Dorsey will block out the noise and take the best guy (in Allen),'' said the exec. "And the Browns will be good very soon.''

He also said "the best comp for Allen (6-5, 233) is Big Ben (Roethlisberger) when he came out of college.''

He added that he never saw Darnold "as a No. 1.''

Kiper surprised a lot of folks by going with Allen to the Browns at No. 1 overall in his Mock 1.0 on Thursday -- and fellow ESPN expert Todd McShay didn't fight him on it.

"When you look at who finished the strongest of the top three quarterbacks, he did,'' said Kiper. "You can say, 'Well, he had the shoulder injury.' He did. But he came back from the shoulder against Central Michigan and he lit it up. Made NFL throws, showed tremendous competitiveness. Remember, beginning of the year, they were missing key starters at running back, wide receiver, tight end and center. That's why he had some struggles against Iowa starting out the season.''

But Kiper believes he's the best QB in the class, and McShay didn't have a problem with the unorthodox pick.

"You (can) make an argument for the negative,'' said McShay. "If you look at the top 20 quarterbacks in the NFL, there isn't one that's completed less than 60 percent coming out of college. He's at 56 percent. He did not play at the highest level (Mountain West Conference). That's fine. I can get over it.

"You go watch the tape and you see arguably the most talented quarterback we've seen in the last five years just from a physical tools standpoint. And in Cleveland, he fits what they're looking for.''

NFL draft analyst Daniel Jeremiah, a former Browns scout, believes Allen has the highest ceiling of the 2018 quarterbacks, and believes the Giants should target him at No. 2, assuming the Browns draft Darnold.