What is the most powerful DnD multiclass?

In the realm of Dungeons & Dragons, players often ponder which multiclass combination yields the greatest strength and versatility. What multiclass combination, in your opinion, stands out as the most powerful, offering a blend of abilities that can turn the tide of battle and conquer even the most formidable foes? Is it the potent blend of a wizard's arcane prowess and a fighter's martial prowess? Or does a rogue's stealth and a bard's charm create an unstoppable force? Share your insights on the ultimate multiclass build that reigns supreme in the eyes of both players and Dungeon Masters alike.