Hi there! Let’s see what I can do…
Large City - Big City (Magnimar) has a lot of the sounds you’re looking for, including streets and a market. Friendly Tavern is good for when they put up their feet (and there’s a Tavern Keep set for the bartender). The Local Heroes set has some shops and whatnot, and the Creepy Shopkeeper does too, plus some dialogue buttons.
For Evermoors - Elements - Horror is a good set, which includes several mist/fog elements for general creepindess/eerieness (and can be adjusted for minimal to maximal creep). Add in a little Elements - Wind for the wind through the moors, and perhaps a little bit of birds or vegetation from Farmland. For the crumbling ruins, kick up the Elements - Horror, kill the wind and birds (or switch the wind to ominous wind) and there is a great “crumbling buildings” element in Death House I that would suit for old ruins.
For the mountains, there is a Mountain Pass set for traveling and whatnot. For the tomb, there are several sets that could suit: Catacombs of Wrath has both dungeon and undead, or you could use Dungeon Depths and Undead Battle (or Zombie, Wraith, or Devourer Battle), or there’s a Dungeons set from the Curse of Strahd adventure that is also good. For the artifact, you could use Shimmering Veils, or personally I like the Preserver Artifacts from the Sci-Fi player, which has interesting “awe” elements from anything from good things to eerie things.
Overland Travel - Wagon Journey is your best bet there. For the hill giant encampment, Into the Valley (the mood In the Valley) is a good one. For the gluttonous hill giant chieftain, use a some of the same sounds as In the Valley, the giant grunts and growls, hill giants, crackle (of flames). Then add some sounds from Friendly Tavern (glasses and whatnot) or if you have the Supersyrin, there is a community set called “Steadying of the Hill Giant Chief - Mansion” which has some giant eating/feasting whatnot. If you want to add some… color, try the Gurgles & Gas set, for chewing, burping, farting, etc.
I hope that helps!