I always felt Superman was the balance. Both Wonder Woman and Batman are “my way or the highway” types. During debates, they’re both big on the mic-drop moments. They say what they want, and they could care less about the opposing viewpoint. There’s not a whole lot of effort put into"understanding."
Also, Wonder Woman definitely wields truth as a weapon. But it’s only the truths she chooses to reveal. And it’s extremely rare that such power is directed back upon herself.
Don’t flame me. But I thought this was a pretty good question. To me, Batman and Wonder Woman are extremely close in how they view the world. Superman, ironically, brings some humanity to the discussion.