Lombard's record is terrible for a champ to say the least. (Not wins/losses but level of competition) He really hasn't beaten anyone near elite status. He fought Mousasi once and Mousasi won.
Fact of the matter is he is definitely unproven as an elite MW in my eyes.
1.) It's the MW division how many "elite" fighters are out there, most move up to 205.
2.) Mousasi didn't win, the judges gave him a close decision. If that's an MMA fight under unified rules Lombard wins or draws that match.
3.) The combined record of those "cans" Taylor (20-7), Vitale (29-9), Doerkson (47-16), Shlemenko (42–7) - 138-39 that's a win percentage of 71%. That's in line with the UFC champions who are between .706 -.806