How does Otto Wallin fare against these AJ opponents?

Then AJ was very poor compared to Wilder. Wallin doesn't have the power of those guys so he's going to win by decision far more often than not. He virtually pitched a shutout against AJ's 8th best win away from home and didn't take much damage. If Wallin was poor then most of AJ's other opponents probably are too.

 

If a fighter turns up unmotivated, out of shape, inactive, looking to get rounds and to play possum (Wallin's been avoided by several HW's, including Whyte) without taking any damage, you might get a glorified sparring session like that. AJ's a much bigger puncher than Wallin and he cares more about stopping opponents, so even on a bad day he'd probably stop Sokolowski over 8 but that's a stylistic and temperamental difference.

 

Who has Parker (who couldn't stop Cojanu or Fa) ever stopped as good as Wallin? Who was the last undefeated, never-dropped opponent that Parker stopped?

Going into the Breazeale fight you said:

"It will be good messauring stick for wallin.

Breazeale is more proven of the 2 and has 4 wins more impressive than any of Wallins"

Breazeale allegedly being "more proven" and having "4 better wins" didn't stop him from being outlanded 232-91 and losing 9-3 on the cards to Wallin in America. By your own standards Wallin proved he was far better than Breazeale.

 

Martin was green when he fought AJ and came to take a dive, a few years prior to that he drew with a 6-12-7 journeyman. At least Breazeale came to fight, landed some shots and took AJ 7 rounds. If AJ was "ill" against Breazeale then green Whyte was badly injured against AJ.

Who is Takam's (who lost to ex-kickboxer and journeyman Gregory Tony) best win? A 9-3 at home over a mid 40's Tony Thompson who Malik Scott outboxed and Ortiz destroyed in his next two fights? His claim to fame is losing to Chisora, who has lost every time he's stepped up.

 

How are they much better? If it's because they have "better wins" it's meaningless because apparently Breazeale had four(!) better wins and he got schooled regardless. You can also look at it another way: they all have far more and worse losses than Wallin.

Who was Dimitrenko's last notable win when Parker stopped him? 36-16 domestic journeyman Sprott 5 years prior? Is that even notable?

 

That's funny because AJ fought Wallin in Britain in the amateurs, Wallin being a year younger and the fight was competitive. The question isn't about how AJ would do against Wallin though, it's about how Wallin would fare against AJ's opponents such as Whyte, who blatantly ducked him.