Speakers that image best from corners 12' apart

the subject line nets this query out, but I'm trying to find speakers to use in my living room. Klipschorns are out as this is a formal living room so WAF is a consideration. The room is 13'x15'. There is a wall unit 9' wide that will sit between the speakers. I've tried multiple speakers in this room but none like being spread that far apart. Presently I'm using Totem Sttafs and I pull them out into the room when listening. This isn't my primary listening room so I don't want to do that. I simply want a speaker that's optimized for corner placement and runs full range.

Budget-wise I'd like to stay under $1000, preferably well under that. I'm expecting to buy used.

Floor standing is preferred.

Is there a solution for me?

thanks!!