There are many that you can get with elongated bowls and 10" rough.
In the Seattle area, I'm bringing in some 10" Toto Drake toilets.
They only need 9-1/4" to install.
CST744EF.10 or CST744SF.10
Comfort height, elongated bowl with either the 1.28 gallon Watersense Eco Flush
or the 1.6 gallon G-Max flush.
Gerber Ultraflush, w/10" tank
Cadet 3 w/10" tank
Toto Vespin, Carlyle, Soiree, Guinevere, w/10" Unifit
Toto Vespin II CST474CEFG with SS114 Softclose seat.
Map rated at 800 grams, Killer!
This bowl was installed on a 13-1/2" rough-in using the 14" Unifit adapter.
The water shutoff can be as close as 5-1/2" to the left of center, unless it's higher off the floor, and then it can be even closer to center.
This shutoff had been replaced with a new 1/4 turn valve with brass nipple through the wall.
Installation was by James Love of Love Plumbing & Remodel 206-949-5683
In some of the older Seattle homes, the old toilets had been wall mounted tank toilets.
Those typically are 14" rough-in and need a flange repair to use standard closet bolt connections at the flange.
Everything is on the truck for that.
The Vespin comes with a standard 12" adapter or you can order a 10" or 14" adapter depending on your rough-in distance.