Services with recommendation algorithms can help. Mixcloud can be good, because it features longer mixes that often contain similar music, collected by someone who knows their stuff. You can also check the associated label's other artists, smaller labels often organize around a similar mood or style. I check the people my favorites collaborate with.
Examples: “Boy Meets Robot”, “Unwoman”, “The Darkest of the Hillside Thickets”, “Goldfrapp”, much of what is featured on “Dark Compass”.
Where do people go for music like this? Bandcamp? Other places?