Honestly, the one name that generally comes to mind for me as a true English Battler is Troy Baker. I think he'd be the best at playing Battler as super cool and manly. The other name that came to mind when I played it was Grant George, Battler's definitely a much better fit for him than Keiichi (seriously, what the heck?).
Even after playing Umineko I still have not come up with any idea of a good English Beatrice. Sayaka Ohara is really legendary in the role and I have no idea who can do the role justice otherwise.
Honestly though, Umineko has the best VO I've ever heard in... anything. It's just so dang good. I wish the VN dub wasn't being done by.... Sound Cadence in Texas. They put out a sampler a while ago and their Battler sounds TERRIBLE.
Embarrassingly I never actually played Higurashi, just saw the anime and that was a decade ago... Your request finally spurred me to start it. Thankfully I found a great mod for the Steam version that adds in all the VO. And, uh, Ryukishi07's original art... If you're into that...
Thanks, man! After listening to clips of Kim Strauss and Keith Silverstein as Tatsuya, I thought Ray could take the best of both performances and perhaps even combine their voices while also adding his own flavor.