Which speakers work close to back wall?

I haven't kept up on their current models in that price range, but Mission speakers always worked well near the back wall. They actually recommended 8" on my old Mission 752's and 753's, 751's, etc.

Come to think of it...my Merlin VSM-M's are front-ported and also work well near the rear wall. I normally keep them about 5' out, but occasionally push them back to 18"-24" when guests stay over. The bass does increase some and there is some loss of depth, but they still sound surprisingly good. I think their TSM stand-mounts would also qualify.

Spendor S 3/5, and the Harbeth HL-P3es2 would make excellent
choices for your needs. Both sound very musical and depending on your equipment/musical preferences/room dimensions one of these loudspeakers should suit you well.