Enter the Gungeon

Royal Days
Take Over

Soldiers of the Sea
The Calling
Return of the Obra Dinn

Cry for Me, Cry for You
The Garden of Recluse

Can't Say Goodbye To Yesterday

Chemical Brew
Mind Parade
Overdose

Snake Eater

Burn My Dread
Changing Seasons
Battle Hymn of the Soul

0-GRAVITY

Blood Maker

Ideal For Violence
Virtical Point
Otometal my life

Funk Goes On

Snowflakes

JUDGEMENT -Shinpan-
Reign
Like a Butterfly, Like a Bee

Strepitoso Fight
Gin No Ishi Super Arrange Ver.
Gin No Ishi Kin No Tsubasa

Gear
Fascism
Dancers #5

A Scattered Moment
Evil Itself

Baka Mitai (Akiyama)
Vendor Pop
The Passion for Batting

Pursuing My True Self
Heartbeat, Heartbreak
The Genesis

The Stains of Time
Collective Consciousness
It Has To Be This Way

Phantom Pain
Sins of The Father

Inevitable Struggle Super Arrange Ver.
Miss You
Aoi Kiseki

Ancient Beating
C.S.P.D -Crossbell State Police Department-
Way of Life

F.S.R. II
One Resort
Crescent II

Danganronnpa Super Mix
Argument [TURN UP THE HEAT] 2nd mix
Kill Command

Debate Scrum
Rise and Shine, Ursine!
PSYCHE TAXI

Life Will Change
Price
Rivers In the Desert

Ichibanka
War Maker
Machine Gun Kiss (Adachi)

Loser
Independence For Violence
D2A

Ok the soundtrack as a whole isn't nearly as good as the other games on this list but it gets this slot because of Loser

SAYONARA Silent Night
Soul of the Ogre
Un altro appassionato

Sad Mechanism
Viva La Vida!
GO! SHUSHOU SUMMER

A Glacier Eventually Farts (And Don't You Listen to the Song of Life)
...con lentitud poderosa
You're Gonna Need a Bigger Ukelele

Counter Strike
Daredevil
Axe to Grind

Whiskey & Rhapsody
Broken Police Radio
Receive and Bite You

Lambda
Rake Your Inside
Destination

Blood on the Dancefloor
Reaped by Death
Ashes to Ashes, to Ashes (To Ashes)

Honjitsu Wa Diamond
Hands
DESTINY

Unwavering Belief/Dig in Your Heels
Viper
Green Vibes

Whiteout
Apricot Square (Erika Ito remix)
Jack Hammer (Erika Ito remix)

The Silver Case
Kusabi
Public Security

Im going to cheat here and put the remaster OST seperate because there are too many greats.

Metropolitan Edge
I'm a Detective
DRIFT

Especially this one I could go on.

If I were to listen to one of the OSTS here in full this is my pick.