Stacked "older" orignal Advents. Still wish I had mine from decades ago. Didn't "image" but they did sure "moved air".
Magneplanars, any model, Gotta have power, gotta have room, gotta not own cats. Older vintage ones do not age well and need rebuilds.
Yamaha NS-1000, No other japanese speaker system and no other Yamaha speaker did what these did. I wish I had picked up a pair when I worked in a shop that sold them when they were new. About as uncolored sound as I can imagine coming from 3 way cones and domes in a box. (The Yamaha NS-10 on the other hand are on my list of worst)
Dahlquist DQ 10, need careful rebuild/update with that piezo tweeter replaced by something, anything. When they are right they image like mad.
Proac Tablettes, any vintage - They don't do ANY bass and with the wrong solid state amp they can make ears bleed but, in a moderate to small room with some help in the bottom end from a good subwoof, they do music.
There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy.
Hamlet Act 1