Dungeons give barely anything, even with in demand bonus. Torghast gives nothing, nor does pvp. Neither do pet battles. World quests give a little bit. Command table gives a little. Daily calling gives 1k? Levelling netted me 4k for 50-60 while herb and mining during that time got 20k. So quests give barely anything.
I'd like to see more sources of gold. I wonder if it's still the WoD and Legion inflation making gold rewards so small relative to AH. Probably never going fully away?