I think it will be a hybrid TE/FB/WR combo, much like Aaron Hernandez was for Florida and New England. I think of Chris Hickman in this role for NU. His skills and talents are different than guys like Jack Stoll or the 2021 recruit out of Council Bluffs. There will be room for classic TE's who are on-line blockers and down the middle threats in the passing game, but the want for versatility in an offense will be big for guys like Hickman.
Number 44 for San Francisco made a couple big plays in last night's Super Bowl is a TE/FB combo. People want to call him a fullback because he's #44.
EDIT: #44 does have classic fullback size (6'1" 240 lbs) so I guess he should be considered a fullback. But, he's clearly not just a battering ram as a player. I would also be curious the percentage of plays which SF ran 2 back sets in last night and over the course of the season.
2nd EDIT: Here is an article from Bleacher Report which shows that SF ran 2-back sets about 30 percent of the time, ranking 2nd in the NFL behind the Vikings. Of course, I think the Vikings offense is far too conservative, and is head coached by a former defensive coordinator.
https://bleacherreport.com/articles/2866506-how-kyle-shanahans-secret-weapons-schemes-have-made-49ers-a-title-contender