1. Top of the Lake
What it's got in common with True Detective: An out-of-town cowboy (or rather, cowgirl) cop protagonist, gorgeous scenery, a small community with a dark secret, an examination of rape culture and toxic masculinity within its central mystery, antler motifs.
What it does better than True Detective: Dynamic female characters, tighter pacing, much more confident in its overall theme.
Availability: Streaming on Netflix.
Triggers: Rape, self-harm, violence against women, suicide, child endangerment.
2. The Red Riding Trilogy
What it's got in common with True Detective: Similar cinematography/general look, multigenerational structure, themes of institutional corruption, inspired by actual crimes, a generally grim view of the world.
What it does better than True Detective: Makes no such effort at a happy ending, doesn't have shades of classist hicksploitation, gives us the perspective of other kinds of people than cops, contains 100% more Rebecca Hall.
Availability: DVDs available through Netflix.
Triggers: Mutilation, violence against women, torture, suicide.
What it's got in common with True Detective: Incredible cinematography, a twist on serial killer tropes, toys with what we think we already know, brilliant performances from actors best known from movies, a visionary showrunner, antler motifs (yes, again).
What it does better than True Detective: Well-developed female characters/supporting characters in general, less reliance on sex crimes (which Bryan Fuller has said don't interest him as a plot device), Swiggity Swag the Nightmare Stag. (Also, unlike True Detective there's a very real danger it will be cancelled, so go watch it.)
Availability: First season is streaming on Amazon Prime; current season airs Friday nights on NBC at 10.
Triggers: Cannibalism, gore, gaslighting, emotional/mental abuse.
4. Darkness, Take My Hand by Dennis Lehane
What it's got in common with True Detective: Two badass, compelling, flawed protagonists, a serial killer plot that ties into general institutional rot, a theme of the inescapability of the past, a modern twist on an old genre (film noir, as compared to Southern Gothic), a very strong sense of place (Dorchester, Mass. as opposed to Southern Louisiana).
What it does better than True Detective: A strong female (co-)protagonist, a deeper explanation of the villain's motivation, more likeable central characters, less danger of accidentally reading a spoiler online before you're caught up, you can't watch True Detective on the subway.
Availability: If your library doesn't have it, a bookstore probably does.
Triggers: Torture, gore, rape, child abuse, domestic abuse.
5. The Cutting Season by Attica Locke
What it's got in common with True Detective: A combined character study/institutional critique within a murder, Louisiana setting, neo-Southern Gothic atmosphere
What it does better than True Detective: Focuses on not just a woman but a woman of color, puts race (and immigration issues) front and center, explores how such a crime affects "normal" people.
Availability: Again, library or bookstore.
Triggers: Murder, violence against women, violence against immigrants, slavery