Most “disappeared” speakers.

It's as much about the room and speaker placement than the speakers - maybe more.

+1 Georgehifi

You can try out Magnepan LRS with generous 60 days return policy.

Planar speakers are known for disappearing act.

I also pulled the trigger for LRS although I have nice dynamic speakers.

Charney Audio Companion Horns disappear with SS and tube gear. Soundstage is wide, high, and deep with superior tonal balance.

Whichever one I want.

That is not a flippant answer. If you know what you are doing any type of speaker can do this.

I do not recommend buying a set of speakers based on the perception that one will magically do this "disappearing" act better than another. If anyone is trying to sell you a speaker that way, run the opposite direction, because they are B.S.ing you or ignorant. :)

Buy the speaker based on your loving the overall characteristics of the sound. Setup and selection of components and cables will take care of the rest.