Vorkosigan
The thing I love about the Vorkosigan Saga* is that MOST protagonists who go hogwild for Found Family are trying to replace a biological family that is absent or unsatisfactory. Miles comes from a family where his parents love each other dearly and adore their hyperactive disabled son - and he STILL goes out into the galaxy and says
To the strung out jump pilot that he literally met minutes ago - I’ll just adopt YOU here put your hands between mine for the ceremony
To the homeless military deserter who would be under sentence of death if anybody knew where he was OH HEY, you’re mine, too, come with me to my [new] ship with the pilot I’ve known a whole day, now
To the soldier who got her face burned in the first big battle MA’AM I will get you the best possible reconstructive surgery plus also you are family, now
To the 8-foot tall genetically engineered nightmare with fangs crouched in a dungeon (sorta) MISS you are so tall and beautiful I will break you out of here and you can join my mercenaries plus also I want to take care of you at the end of your life, because I love you so much
To the unauthorized CLONE who was raised to assassinate his politically important father WELL, dude, legally you’re my brother so you should really go home and meet Mom and Dad
I just. Love those books so much.
* Lois McMaster Bujold, author