Kostya Tzyu is widely regarded as an all time Jr Welter. His 'signature wins' remain against Zab judah and Sharmba Mitchell. In that context, TC should be fine
Winning 4 belts in a division devoid of talented belt holders means nothing. Only a moron would argue that and act as if he beat a murderers row to get the belts. Indongo and Postol having titles tells you all you need to know about the talent level in the division.
I dont think that crawford's resume is such bad. He has the mayweather syndrome, every fighter he destroys becomes insta-trash. It only happens to really really good fighters. And crawford is. A signature fight? he has only 3 options that can fulfill fans (haters) expectations as a signature fight. Spence, pacman and... broner (?). Because thurman is retired, isnt he? None of them seems to me a "signature" fight either (since I bet no one would give him full credit for pacman). The truth is that at welter (if we take into account brook) he's fought vs a total record of 138-6. Not bad. He's not opening tomato cans. And I dont say it is outstanding oposition, but, well, good one. Isnt it? not tomato.... decent one. On the other hand, I agree with the guy who said that crawford doesnt really care about legacy or anything like that. I think the same. Money, and that's all. As a prize fighter does. I dont think that's necessarily bad. They fight for money, the legacy and all that stuff is a plus. But the real reason is M-O-N-E-Y.
zab v tszyu was a 'for all the marbles' fight. nobody knew at that stage that zab was a 'flawed genius'. his natural talent was off the charts, but he was immature and a hothead'. crawford, on the other hand, has never taken a fight like that.