Fantastic (Ayu, Darcula, Gruvbox, Material, Monokai, Slime, Oceanic, One)

Beautiful dark themes with Operator Mono font/Italic superpowers

Each theme has a modified version to use with the Operator Mono font / Italic

Monokai

Monokai - Operator Mono/Italic

AYU

AYU - Operator Mono/Italic

Slime

Slime - Operator Mono/Italic

Darcula (99% like PhpStorm and WebStorm by Intellij)

Material Bunker

Oceanic Next

One Dark

Gruvbox

I use this border hacks, if you like, use!!!

  "workbench.colorCustomizations": {
    "titleBar.border": "#000",
    "sideBar.border": "#000",
    "activityBar.border": "#000",
    "tab.border": "#000",
    "editorGroupHeader.tabsBorder": "#000",
    "panel.border": "#000",
    "statusBar.border": "#000"
  },

Background hacks, if you like!!!

add this your User Settings (settings.json)

  "workbench.colorCustomizations": {
    "titleBar.border": "#05080A",
    "list.activeSelectionBackground": "#05080A",
    "list.inactiveSelectionBackground": "#05080A",
    "tab.inactiveBackground": "#05080A",
    "editorGroupHeader.tabsBackground": "#05080A",
    "editorGroupHeader.noTabsBackground": "#05080A",
    "activityBar.background": "#05080A",
    "sideBar.background": "#05080A",
    "sideBarSectionHeader.background": "#05080A",
    "activityBar.border": "#0b1015",
    "tab.border": "#0b1015",
    "panel.border": "#05080A",
    "statusBar.border": "#05080A"
  },

Enjoy!