I assume Gase wants a smart, complete RB, because that versatility opens up the playbook. That, or he wants someone to compliment K. Drake. I think that approach is, at best, risky. Relative to where they're currently ranked by most publications, I'm very high on Rashaad Penny, John Kelly, Myles Gaskin, Phillip Lindsay, Ito Smith, and Larry Rose III. Of those RB's, though, only Penny and Kelly are true feature backs. To specify on Lindsay, Smith, and Rose III, they're ranked as UDFA's or not ranked at all most places. I think they're worth a look in the 5th-7th.
Slimm would obviously have a lot more info than me on the Alabama RB's, but I don't think Scarbrough looks as explosive this year. I don't see a good transition for him. I love watching Harris; he's electric. But, I don't think you draft him to be the guy - like you would Barkley, Guice, Penny, Kelly, Chubb, or even Royce Freeman (for the right offense). He hasn't done much as a receiver, and maybe Slimm could shed some light on how much of that is the offense vs his ability as a receiver. I haven't zoomed in on that feature. I'm seeing 1st and 2nd RD grades on Harris, and that's rich for me.