Most forgiving speakers?

You took away my first suggestion, Vandersteen.

Other than that, maybe Magneplanar 3.6, Soundlab M-3 or Quad 988 depending on how loud you want to listen and personal preferences.

I'd go with Magnepan. I had the 3.3rs & they were the most revealing/most forgiving speakers I've owned until I got my Apogee Mini Grands (more revealing, not as forgiving).
I know it sounds like a contradiction, but I could use stock Adcom 555IIs on the Maggies, if I tried to use them on my Clearfield (Counterpoint) speakers with the Vifa aluminum tweeter (like Thiel used to use) I had to leave the room. Bright sound, way too bright sound!

Acoustat 1+1 ,Xover/with sub,16/20 in from side wall and 4ft
from the rear.

Spendor.