Hannah Jane Parkinson, in a superb article for The Guardian:
There were many great characters in Twin Peaks, but the Log Lady was the best, because she had no failings. Bobby treated Shelly awfully. James, though smouldering in leathers, could never recover from that song, which was as horrific as any song that results when a guitar is produced, unsolicited. Audrey was so beautiful it made me want to weep, but she’d make a nightmare best friend.
Spot on. Cooper may have been the protagonist, but Coulson's Log Lady was our representative in Twin Peaks.