Best Speaker for a reflective room ?

Your room may be too large, but its description reminded me of this video.

The speakers in the video are listed here on Audiogon.

DeKay

Any speakers you want with a black ice f360 preamp:

If it were me, for normal listening from various locations in the room, this sounds like a job for Ohm Walsh. These just put the music in the room as if the players were there which is how concert venues work. You might be able to do some things to somewhat improve the room acoustics but eliminating them entirely is likely an exercise in futility.

The other option is to go for nearfield listening  which minimizes the effects of room acoustics.

I doubt the room will ever sound like you hope it will. I have found out that equipment cannot erase room problems no matter how much money is spent. Who knows? Maybe it will sound good.

Thanks for everyone's help.  I know it isn't ideal.  I had tried ohm in my house up north in a room with similar characteristics and an even higher ceiling - they were lost.  I probably needed to go with larger units.  Thanks for the input everyone.  There are a few suggestions I haven't considered yet and will look into them.