Strongest DC Comics character Monkey D. Luffy (One Piece) can defeat?

What tier (in terms of power) would One Piece's Luffy be if he was a Marvel character? - Quora

Who would win : r/MemePiece

Monkey D. Luffy, VsDebating Wiki

Monkey D. Luffy, VsDebating Wiki

One Piece: 10 Most Powerful Characters (And 10 That Are Just Useless)

Could Broly defeat Luffy one-handed? - Quora

Monkey D. Luffy, Top-Strongest Wikia

One Piece: 5 Characters Enel Can Defeat (& 5 He Can't)

Who would win, Tatsumaki (One Punch Man) or Monkey D. Luffy (One Piece)? - Quora

One Piece: 5 Naruto Characters Luffy Could Beat In A Fight (& 5 He Couldn't)