Jeanty is special. Top 5 player in the draft. But I highly doubt he falls to #26. Hampton is not special imo. He's a good prospect, but he's the sort of guy we see every year. If Jeanty is gone, we should not draft a HB in the first round.
With Kyren and Corum, I'd wait until Day 3. There will be some good HBs available on Day 3. As you said, it's a deep draft. If we go HB earlier, Treveyon Henderson is intriguing. He's not powerful and doesn't make a ton of guys miss, but he's explosive, has great vision, and is very skilled in the passing game. If we want more big plays, Henderson is the type of guy who can provide them.