Aside from the Minimal, Mizuno makes an all carbon fork in 1" today.

Ouzo Pro, Alpha Q, Look, Forte Pro are all good used market all carbon 1" choices. The Pro comes up on Ebay often.

Trek/Lemond forks with steel 1" steerers were made in threadless versions.

If the frame size is small, steel threaded forks from large bikes can be cut down into threadless.