Lol wut? Jones beat Cormier who was 15-0, Gustaffson who had only lost once, a Shogun who still wasn't quite past it, Rashad Evans, Rampage Jackson, Sonnen and Belfort, virtually dominating every fight.
Weidman's only notable wins are his double over Silva which both came in questionable and arguably fortunate circumstances, Machida and Munoz who is even still short of DC/Gustaffson/Shogun quality.
To say Silva and GSP have bigger legacies is correct IMO, but you can't have Weidman above Jones, no matter how much of a helmet the latter is.
Reason I'd place Weidman higher is because he beat Silva twice, who was invincible up until that point (I know the circumstances were strange but he still dominated). Not much higher mind.
It's not because of Jones' personality I don't rate him (I think Mayweather is the greatest technical fighter ever, and he's a pure bell) - it's just I see him as a guy who has a record similar to a boxer who has been by and large a flat track bully with the odd good name on his resume.