Luffy

Anchor being does not have to be immortal

"...When they die, the timeline begins to decay."

In other words, if the anchor isn't alive, the timeline will be erased.

Deadpool & Wolverine spoilers below:

In the movie, when the original Wolverine of Deadpool's timeline dies, he has to go after another Wolverine to replace him. One Piece doesn't have a multiverse, so it's impossible to apply the anchor being concept to its world.

However, based on Harley's prophecy, we can assume that the closest figure to an anchor being are the bearers of Nika's will.

Joyboy is awesome

Nika ig

Roger would be the anchor being and then with his death the timeline would slowly erode away until Luffy unlocked Gear 5 and became the second coming of Joy Boy

Shanks (is shanks still alive I’m not that far in the anime 💀)

Zunesha

@Matt Gerrish Bro there are more than 20 years between Roger's death and Luffy's G5 awakening.

Deadpool had to look for someone to replace Wolverine like a few weeks after his death.

@Httpedrokkk

Remember when Paradox said that a reality takes thousands of years to wither away naturally? He was planning to be a mercy killer and just erase that reality immediately. Deadpool mainly needed Wolverine so he could stop Paradox AND THEN for him to be the new anchor being