Also in 3, Ieyasu decides to take Oichi in when he realises she lost her memories, promising to protect her and help her search for happiness.
Likewise, when Yoshitsugu uses the last of his life force to restore Mitsunari's health at the Sekigahara Infiltration.
Plus when Ujimasa gives Yukimara medicine that'll help cure Shingen. Chances are Yukimura won't be the only one crying Tears of Joy.
Toshiie and Matsu's reunion after she is rescued from her kidnappers, complete with Keiji and Magoichi smiling awkwardly.
From the anime Season 2, Keiji's speech to Masamune, after the latter asks him why he never draws his sword. It just goes to prove that he's got the biggest heart of anyone, even if being a pacifist means he's doomed to keep losing.
If the only time you meet people halfway is when you're stabbing them, this war's never gonna end. It's strange, I know, but just the tiniest things in common are enough to make you not want to hurt a man. People are good, basically... I need to believe that.