Dude, you're crazy. Last year, he was one of the best running backs in the league. There is a reason he had the most yards after contact, because he's a beast, and not because the oline was good....he was running hard in spite of the oline.
In my book Ajayi wasn't a Top 3 all around back last year, probably wasn't Top 5 either (Johnson, Bell, Elliott, McCoy, Howard.) If that is one of the best then our definition of "one of the best" is greatly different.
I'm not knocking Ajayi, he is a nice player. But his success was mostly in part a product of great o-line play let's not fool ourselves.
And when it comes to Football Outsiders (or PFF or whoever), please. They ranked Dak Prescott as a better QB last year than Aaron Rodgers, Tyrod Taylor as a Top 10 QB (ranked 9th), and Brock Osweiler better than Eli Manning and Cam Newton.........so unless you want to defend those rankings and stats, throw the o-line rankings out the window. You cannot take sites like that seriously when it comes to rankings when they have rankings like that they are backing up. Line your birdcage with that stuff. They are "alternative facts" to say the least!
Miami's O-line was Top 5 when healthy and when they lost Pouncey and Albert for stretches was still a Top 10 o-line. Those rankings are useless unles you want to tell me Tyrod Taylor is a Top 10 NFL QB and Brock Osweiler was better than Eli and Cam last year.