Powerful, smallish floorstanders with high WAF?

I do not know what you mean by "powerful", but I really enjoy my Larsen 8 speakers.  I had borrowed a pair from my local dealer and my wife actually liked the way they looked!  She says that they remind her of plant stands.

http://www.theabsolutesound.com/articles/larsen-model-8-loudspeaker/

Platinum Audio Solo's....except for some 'stats I owned, these are the most coherent, musical, smallish yet powerful speakers I've owned in my 40 years as a 'phile....and speakers my wife doesn't want me to move on from. 

You'll get lots of suggestions here, probably all good. Without color or price to go on, I recommend you take a look at stand-mounted Sonus Faber speakers. Several of their models are gorgeous (IMO), but the one thing owners mention in their ads is the high WAF. Don't be afraid to consider the older models as well. No, I'm not selling mine!

@bodotes mentioned Larsen 8. Note that Larsens are one of the few speakers designed to go against the wall rather than pulled out into the room. Depending on your situation, that could really help with your room aesthetics.

As you go up in capability and power, it's hard to keep the speaker footprint small. I have the active version of the ADAM Audio Classic Column Mk3. It's relatively slim (9" x 12" footprint) and doesn't call much attention to itself, but can fill a whole house with the presence of live music, and the bass is strong down to 30Hz. There's a bass shelving control if you want to move them closer to the walls.

I've heard the Larsen loudspeakers and agree that they have a high WAF.  They are designed to be furniture first and audio gear second.  They have a very 2 dimensional image and cost far more than I think they're worth.   Mostly sold to people with money who "want the best" because can afford it, but also want it to look like furniture.  Goes well with your McIntosh stack.