Rainbow Six Siege has been around for almost ten years. In that time, its roster of Operators has grown to a whopping 76, belonging to 37 different Counter Terrorist Units (CTUs). This shows how far the game has come from its initial 21 Operators back in 2015, and the meta has constantly shifted since its release.
The Rainbow Six Siege X update launch has ensured that Ubisoft will continue to support R6, meaning that the meta shifting is going to stop anytime soon. Still, some Operators remain stalwart in many R6 tier lists despite all the changes, and the very best are being considered here.