How Rolento knows Cody? I dunno. I’m thinking that a few (but not all) of the Mad Gear members knew Cody and Guy and had run-ins with them before Final Fight happened and Mad Gear got smacked down for good or so. At least, Damned knew Cody from before, but Edi. E didn’t, judging by the dialogue. Cody’s dialogue with Rolento could go either way, though. Alpha Cody’s dialogue shows that he recognizes Sodom, though he doesn’t seem to recall ever fighting Sodom in Final Fight (we all know that Guy did. That one’s irrefutable at least), so it seems that Cody knew Sodom before Final Fight One occurred (regular Cody’s dialogue with Sodom could go either way, I think).
Come to think of it, Alpha Guy’s dialogue with Edi. E indicate that maybe he was on the West Side accompanying Cody, too.
At any rate, you have to remember that in the end, Father Andore, Uncle Andore, and Grandpa Andore are NOT bosses. They are only mid-bosses, and it takes at least TWO of them to make up the mid-boss battle at that. If they were so powerful, then wouldn’t they be bosses as well as not need to fight as a duo (or trio if Grandpa Andore is there)? Therefore, the end result is that if you were to tier them as Hugo’s SF3 level, then you’d have to up all the Final Fight bosses to tier 3 because they are definately tougher than simple mid-bosses. Then after you do that, Cody and Guy would jump up to tier 2, hehehe…
Course… I do think Cody and Guy do deserve to be somewhere up there, anyways, but if you continued by the logic of father and uncle Andore being in tier four, then you’d have to lump E. Honda up to tier two, because he beat Sodom who’s a boss and thus higher than simple mid-bosses, and now we’re just getting exceedingly crazy. 
Oh, and in Final Fight 2, Grandpa Andore (who’s along the same lines as Uncle Andore and Father Andore) is only a generic enemy, albeit a pretty rare one and the most powerful one.
Abigail could probably wipe the floor with all three of the elder Andores at the same time. Well, gameplay-wise, he sure as heck could. 
I still don’t think Hugo deserves to be in Tier 4 just for withstanding a shin shoryuken, myself. Since that makes him higher than Alex, which is just… weird. But eh, not like there’s much else to compare him to so there isn’t much grounds to start an argument on, anyways.
No one ever takes the intro with Eagle or that Lilith ending as hard proof, sadly. It’s too… circumstantial. Which is why I’m glad for this win quote
The Lilith ending is already mentioned there, though. Forgot to mention the Eagle one now that I think about it…