Best standmounts with a 7" woofer/driver

Wharfedale Elysian 2

($6995)

Treble:    3.5" (90mm) Air Motion Transformer
Midrange:    6.0" (150mm) coated fiberglass matrix cone
Bass:    8.5" (220mm) coated fiberglass matrix cone
Nominal Impedance:    4Ω (compatible 8Ω )
Crossover Frequency:    360Hz, 2.9kHz
Frequency Response:    35Hz ~ 22kHz (+/-3dB)
Sensitivity:    89dB (2.83V @1m)
Recommended Amplifier Power:    25 - 250W
Weight:    67.2lbs
Dimensions (HxWxD)    27.6" x 13.1" x 17.0"

I would like a bookshelf that can move some air. Big sound. I currently own Revival Atalante 3.They have a nice 7 inch driver. Just shopping for possible upgrades. My room is 14' X 12'

Not sure what specific upgrades you're looking for. If you're after more air movement, a bigger sound, or deeper bass, the Atalante 5 could be the best candidate, while still retaining the traits you like in the 3. The options might be limitless and people are shooting random darts here unless you specify what you're aiming for.

Reynaud Bliss Jubile'

https://hifiplus.com/articles/jmr-electroacoustique-bliss-jubile/

If you want a bookshelf speaker with bass, listen to the Generation 4 by Watkins Stereo.

https://www.watkinsaudio.com/shop

https://www.theabsolutesound.com/articles/watkins-stereo-generation-four-loudspeaker/

If you like the Atalante 3s but want deeper bass, larger soundstage, better imaging etc you can add a pair of subwoofers to your setup and that should do the trick.  You could spend half of what some of the recommendations cost and get excellent subs that would likely give you what you want.  I added a pair of subs to my system and it did all the things I mentioned above. If you don’t want to entertain the idea of subs then forget I mentioned them 😀