Mousasi has also beaten Lombard in Pride. Lombard may have been raw but so was Mousasi being very young at that time.
I think Mousasi would of been signed by the UFC when he was the Dream champion if he had a marketing persona. Mousasi is a fighter who shows his skills in a MMA fight. His deameanour as a person is very relaxed, we dont ever see him hyped for a fight or pumped winning a fight. He is very similiar to Fedor where we get a smile if he wins.
Hopefully we see his wrestling skills improving which he showed against Ovince. He improved that area at an amazing rate which we saw him dominate Ovince in grappling, who was supposed to out wrestle Mousasi himself.
He has K1 level striking already so who knows how great he can become.
THe UFC tried to sign him years ago but he had visa issues.