If the 4 Yonko's are supposedly the 4 strongest pirate crews and Luffy is the Fifth Emperor of the Sea, doesn't that basically make the straw hats the 5th strongest pirate crew? -
Current Straw Hats Strength Tier List : r/OnePiece
The 5 Strongest New Era Pirates In One Piece (& The 5 Weakest)
All 10 Straw Hats RANKED from Weakest to Strongest! (One Piece) - YouTube
The Strongest One Piece Straw Hats Ranked According to Japanese Fans - IMDb