there never was a monster trio and there never will be.
Not with the name obviously that’s a fanmade
but it’s clear oda created a dynamic of the 3 being in a league of their own in the crew
and there was so many instances of oda portraying them >>>>>>>>>>> the rest
(Luffy/zoro/sanji taking on by far the strongest cp9 members , in the desert where the 3 attacked the dragon , in pre ts sabondy when the 3 attacked the pacifecta in a combo moves, post time skip when the 3 one shot the pacifecta , when the 3 separated in 3 groups leading the rest , in skypia when the 3 got attacked by wiper etc........)
doesn’t mean they’re equal
Obviously they’re not
It’s always luffy>Zoro>sanji
But the dynamic of the “M3” was and will always be there