I'll be the odd one out. I would rate them:
1) T-Rex
2) RFC
3) Raglan Road
Our meals at T-Rex & RFC aren't the best meals we've had at WDW, but we've always enjoyed them. We've eaten at RR twice, & didn't like the food either time. We think the food at T-Rex is a little better, but not enough to make you choose T-Rex, if you prefer the atmosphere at RFC.