In terms of strength? Nah.
In terms of importance? Yes. Luffy can't become the PK without Sanji. And if Zoro becomes the WSS, it will makes Luffy looks good. Both are essential to the crew. The pillars of Strawhat you could say.
Imagine not liking Luffy.
Sorry, too much in my mind right now.
Does that matters? And Sanji blocked Big Mom's attack in WCI already.
Yeah that's what I'm trying to say.
The terms "Monster Trio" is in the Japanese raw scans. The "Three Monsters" part is also a official translations but just like with the "Animal Kingdom Pirates" and "Beast Pirates" for Kaido's crew, people prefer the latter hence why people picked Monster Trio over Three Monsters.
That's why I'm hoping for a Monster Trio vs Kaido panel. So that it would ends the debate once and for all.
1. Sanji's body already got injured.
2. Not all Warlords are equals.
3. Jinbei blocked Napoleon and got send flying by nerfed Big Mom while Sanji blocked healthy Big Mom's attack.
4. Off-guard and Sanji can't fight women. He already clapped Blacktooth and is fighting Queen in Base Form right now.
? No one wants Sanji to be in Zoro's or Luffy's shadow. Sanji is his own character. Whatever Sanji does credits to himself only.
Nah, I'm not saying Zoro = Sanji. Just saying Luffy first, Zoro second and Sanji third. ^^
While Jinbei and Yamato might look better than Sanji, it's all comes down on whom opponents they will defeat. If Sanji beats Queen while Jinbei only beats WsW, Sanji > Jinbei. If Yamato fights Smoothie or someone below that, Sanji > Yamato as well.
Sure the damage might be too big but I still have hope. ^^