I haven't eaten in Epcot, but I can throw in that I have ressies in June for Le Cellier lunch and Coral Reef dinner, both are 1 ts and have came highly recommended from a friend who goes multiple times a year. One that I wanted to get, but it hasn't fit my schedule is Garden Grille, which is also 1 ts and you get to eat with Chip and Dale.
Hands down if we had to choose one place to eat for 1 TS in EPCOT it would be Le Cellier lunch. Other options are great, but nothing in EPCOT compares to Le Cellier for us!
If I had one table service I would probably pick either Le Chefs or Garden Grill. My DH would pick Biergarten. My boys (3 and 8) would prob. pick Garden Grill or Beirgarten. They are all so good!!!