When participating in the Game of Thrones, there are players, and then there are players. The latter takes a backseat in the conflict, quietly planting the seeds so no one notices them moving the pieces on the board. The two players that conspired at their own free will the most were Game of Thrones' Lord Petyr Baelish (aka Littlefinger) and House of the Dragon's Lord Otto Hightower.
Source:https://www.cbr.com/game-of-thrones-littlefinger-otto-hightower-most-manipulative/