The degree of influence that each lesser house had on the world around them varied, both in terms of the extent of their influence and the manner in which they exerted it. Sometimes, a single influential individual from a lesser house could overshadow a house with multiple family members. Additionally, some lesser houses caused death and destruction through their rise to power, while others played a crucial role in preventing the collapse of the Seven Kingdoms.
House Reed, consisting of Howland Reed, Jojen Reed, and Meera Reed, assisted House Stark in critical times. Howland saved Ned Stark during Robert's Rebellion, while Jojen and Meera guided and protected Bran Stark on his journey. Their contributions were vital to the survival of House Stark and the overall fate of Westeros.
Additionally, House Tarly exemplified how a noble house can possess members with distinct yet equally important skills. Randyll and Dickon Tarly excelled in combat and athleticism, while Samwell Tarly, despite his different preferences, became a maester. Randyll had a significant impact on the outcome of events, and Sam's exceptional skills as a maester played a crucial role in uniting Jon Snow and Daenerys Targaryen and defeating the White Walkers.
The Clegane brothers, Gregor and Sandor of House Clegane, proved that warriors are just as vital as rulers in determining the outcome of conflicts. Gregor served the Lannisters, while Sandor protected the Stark sisters, Sansa and Arya, on multiple occasions.
On the other hand, House Frey violated sacred traditions for their own benefit. Walder Frey and his sons orchestrated the infamous Red Wedding, betraying the Starks and Tullys. This dishonorable act dealt a severe blow to House Stark and granted House Frey dominance in the Riverlands.
House Mormont played a significant role in aiding two important characters, Jon Snow and Daenerys Targaryen. Jeor and Lyanna Mormont supported Jon, while Jorah Mormont faithfully served Daenerys. Their contributions ranged from defending Westeros against the White Walkers to being the first to declare Jon King in the North and offering critical advice to Daenerys.
Perhaps one of the most influential lesser houses was House Bolton, who replaced House Stark as the dominant power in the North. Roose Bolton betrayed Robb Stark and played a vital role in the demise of the Starks, securing power for his own house.
Finally, House Baelish, though consisting of only one member, Littlefinger, demonstrated how a single individual could change the world. Littlefinger's cunning manipulation and orchestrations, such as the murder of Jon Arryn and sowing discord between the Starks and Lannisters, set in motion the War of the Five Kings and had far-reaching consequences for Westeros.
In conclusion, while the great houses played significant roles in Game of Thrones, the lesser houses also shaped the story in profound ways. Their actions, whether by taking control of their territories or aiding core protagonists, had a lasting impact on the world of Westeros. Truly, Westeros would have been markedly different without their participation, for better or worse.