Pure blocking tight ends can be found later in the draft and don’t often get scouting profiles.
Tight ends that are scouted get evaluated on two, two-part scales:
Receiving Ability / Blocking Ability
Able to line up outside / able to work inside routes
“Catch Radius” is important… good with tall, big armed TE’s. Often refer to these guys as able to “post up” like an NBA power forward… running routes, turning around and having balls thrown to them where defenders don’t have a chance. Often offer little yards after catch, but dependable.
“Seam Route” matchup nightmares. Some tight ends can make an NFL career out of this one skill.
“Matchup Nightmare”… this is often used for a tight end that is basically a bit too big to be considered a WR, but still has speed. Too big to be covered by corner or safety, too quick to be covered by linebacker.
“H-Back” qualities… able to act as lead blocking fullback, or even ball carrier sometimes.
Inline blocking skills… able to act as 6th offensive lineman in run game.