Who is the strongest Character that Iron Fist can KO?

self explanitory.

silver surfer? assuming he doesn't power up or anything..

i don't think so 😐

It tends to vary a lot. He once knocked a guy who could hold his own in a fight against both Thor and She-Hulk when Danny himself was relatively weakened.

At another time, he hit Luke Cage with his strongest punch and Cage just shrugged it off.

I haven't been to up to date on his current run though, so something may have changed recently that I'm not aware of.

a shadow priest

At the moment he seems to be developing more powers as opposed to increasing the power of his Iron-fist, although, for all I know, his Iron-Fist could have gotten stronger ✅

Iron Fist did knock out a drunken mortal Hercules with a single blow [Heroes for Hire]

I would say Namor or Herc.

Silver Surfer? WTF?

All of Alpha Flight.

Simultaneously.

Originally posted by Soljer
All of Alpha Flight.

Simultaneously.

I will stab you. I maybe Canadian, but I have a thing about stabbing

WWH.

Originally posted by Harry Fingerman
WWH.

Without the Iron Fist.

Martian Manhunter

Originally posted by Validus
Martian Manhunter

While intangible. 😐.

Wonder Woman.

Originally posted by Harry Fingerman
Wonder Woman.

While channeling the God Wave.

😆 at all of Soljer's retorts/respones.

hmmm...i'd have to agree with Namor/Herc.

Originally posted by NiñoAraña
😆 at all of Soljer's retorts/respones.

hmmm...i'd have to agree with Namor/Herc.

Only if it's a hyperhydrated Namor, and an Immortal Hercules. At the same time.

Storm and Apocalypse.

Maybe.

Originally posted by Symmetric Chaos
Storm and Apocalypse.

Maybe.

Only if itz teh fool potenshal Strom!1111