You can think what you want pall, Sanji is a powerhouse, when you know about op as a whole.
Sanji is in top 100 most powerfull characters in this show so far. After this arc he will be legit commander level.
How many people are in the world of one piece? Millions, billions? If sanji is top 100( even top 1000 is good) from all those people, he is indeed a powerhouse.He is in the top 0.001% strongest people tho.
What are you refering when you say that he isnt a powerhouse. Do you want him to be in top 10-20 strongest people to be considered a powerhouse or what?