Marin has some, called their "Natural Fit" road bikes, but they don't make a full carbon. Their top WSD model is the Treviso, at $1140, with carbon fork and seat stays.
Schwinn promotes a comfort line of road bikes, but only within the $500-$1000 price range.
Felt has a number of WSD bikes, up to the FW2 which is carbon w/Dura Ace components.
Once you've covered Trek, Specialized, Cannondale, Giant, and Marin, you've covered much of the mainstream market. Most of the other brands tend to cater to performance buyers or speciality niches. I haven't seen many of the others focusing on comfort road bikes. Raleigh tried in '06 & '07 with their Cadent bikes, but changed those to flat-bar designs in '08.
As to Trek, they've flowed some of the comfort geometry out of their Pilot series into other bikes. It is kind of hard to follow it across their line. Even some of the Madones have touches of it.
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"Too often I would hear men boast of the miles covered that day, rarely of what they had seen." Louis L'Amour
There are two types of road bikers: bikers who are faster than me, and me. Bruce Cameron - Denver Post