I'd have to agree with Shauner that Conroy's take has gotten a bit bland in recent years, just in the sense that it seemed more nuanced in his early days doing it on BTAS. He just seems a bit on autopilot nowadays, which tbh I don't really blame him for. A lot of fans seem to go bonkers as soon as they hear his trademark stern take on the character.
Have to agree that Greenwood is second in terms of Batman VA - thought he was solid on YJ and great in Under the Red Hood, just had that pretty balanced mix of stern and nuanced in the voice.
I also can't help but agree with people's take on Bale's performance in TDK flying under the radar - just what he does with his eyes and some of the inflections in his voice is excellent. An aspect of Bale's performance as Bruce/Batman that's underrated imo is the fact that he sold the hell out of the vulnerable/human side of the character that was so essential to Nolan's vision. I honestly don't think any other actor could've pulled it off the way he did.
Then, concurrently, he sells the **** out of pure Batman moments like this.