I'm not talking about some fodder randoms you can only know if you look at the one piece fandom that are irrelevant to the story + the fact they have not comparable strenght is purely headcannon cause absolutely noone knows their power
You are talking about first mates, whether "fodder randoms" or not. Aladine was never compared to Jinbe in the way Jinbe was compared to Tiger, yet he was Jinbe's first mate. Mohji's captain is Buggy, one of the most relevant pirates in this story, and we know he has been put as way more comparable to Cabaji considering their draw in their fight for captaincy. Regarding Boo, he's obviously way weaker than Sai considering both characters importance plus their performance against the Funk brothers. Sarquiss clearly didn't stand out compared to Bellamy, and Jango was Usopp's versus while Luffy took care of Kuro himself.
First mates are never portrayed, let alone confirmed, to be close ni power to the captains; and I have huge doubts about the likes of Rayleigh or Zoro (who isn't the first mate but the combatant, anyways) being close to Roger (whose only explicit comparison was with Whitebeard) and Luffy.
As I said, you made things up and went for some biased cherry-picking.