You could easily say the exact same about Tarantino and his films. He hasn't made as many, but out of those he directed, 3 are brilliant, 3 are good and 2 are average.
Both are still better directors than the husk of James Cameron.
I'd say six are brilliant myself, one is very good and one is okay. But even allowing for yours, six of his eight films are at least good and Scott > ? Please CLEFF.
Cameron's a dildo. Two great films. One very good one. A bunch of pretty documentaries that don't amount to much. One atrocity comparable to war crimes and treason.