My top 5 actors
5- Robert Pattinson
4- Armie Hammer
3- Oliver Jackson Cohen
2- Miles Teller
1- Ethan Peck
My honorable mentions would of course be Nicholas Hoult, Aaron Taylor Johnson, Jack O'Connell, Jack Reynor and Dylan O'Brien
However, for me it is between Ethan Peck and Miles Teller for me anyway. Pattinson for me made this list but he was at #5 if anything. I just can't see Pattinson as Bruce Wayne or even see him as Batman because to me he has more of a villainous look to him than a hero look. Pattinson would make a great Joker or even casting him as Two Face or Scarecrow. Armie Hammer of course for me would be at #4 because as much as I love Hammer and I do I don't think DC/WB will cast him especially if it comes down to scheduling conflicts which I am sure there will be. Plus if Marvel reaches out to Armie before DC does, then well there you go. Oliver Jackson Cohen for me is an unknown in the sense that he isn't as well known to people especially in Hollywood which works well in his favor and with this role if he were cast as Bruce Wayne it would no doubt be a breakout role for him.
However for me, Miles Teller would be at #2 because like people say he is not only free in terms of scheduling but at the same time he does have CBM experience all be it failed experience with Marvel's Fantastic Four but that is no doubt through no fault of his own especially considering the script was not only bad but the movie overall just wasn't that great to begin with. Plus Teller is becoming more well known out there in Hollywood case in point his projects that he has coming ie. Top Gun Maverick and he does have the Bruce Wayne look to him that he could definitely pass off for being billionaire playboy/tortured soul. Not to mention Teller can definitely act.
For me Ethan Peck is the favorite because not only can he act but looks wise he definitely could pull off being Bruce and he has the squared jaw thing down as well. Not to mention he is underrated as an actor. Yeah sure he may not be as well known but that is of course what you want especially if you're DC. It has worked wonders for Marvel in terms of casting actors who are not as well known and they break out in roles given to them.