In no particular order:
A Winged Victory: Atomos
Oneohtrix Point Never: Replica
Emeralds: Does it look like I’m here
War On Drugs: Lost in the Dream
Fennesz / Sakamoto: Cendre
M83: Hurry Up, We’re Dreaming
Holy Other: With U (technically an EP)
Errors: Have some faith in Magic
Hammock: Everything and Nothing
Seems I have mostly been listening to depressive ambient for a decade 
I wanted to include something by the ones below but somehow they don’t have a single album that stands out – or if they have, it was released just before this decade
Wild Beasts: Two Dancers
King Creosote & Hopkins: Diamond Mine
Mew: No More Stories
Nils Frahm: Solo
Apparat; Walls
Lusine: A Certain Distance
Moderat: Moderat
Wild Nothing: Gemini