Taylor, Gore, Jackson, and Dillon all weren’t much of receiving backs. That’s where I think Kamara will be viewed differently.
Kamara has more career receiving yards than those RBs right now, or just a few dozen yards under some of their totals, and still has about 3 more prime years left. He’s impacting the game in receiving more than they ever did in their primes.
I think if Kamara passes Marshall Faulk’s #1 all time RB receiving yard total (6875) by a few hundred, finishes with 10k rushing, and 120 total TDs, he’ll get in within 10 years after retiring. That would put him within the top 10 all time yards from scrimmage.
Gore and Fitzgerald are the only top 10 YFS leaders not in the HOF but they’ll be there soon. The RBs in the top 10 YFS received over 3000 carries to get most of their YFS, while AK’s getting his YFS from a closer split of carries and receptions.