These guys have been around for a while but for some reason never really made it big. Totally underrated. I've seen them play live several times and they always put on a great show.
The 1975 and The Neighbourhood. A little different rock sound, but solid and have a lot of quality songs imo
It's official, I'm going to have to end my metal hiatus. I was big into metal, then started having kids, and for the most part stopped following the genre. For me metal is frozen in 2006- Lamb of God, Trivium, Between the Buried and Me, Opeth...Might be too “metal” for you but the new Architects album should be pretty palatable for someone of your tastes.
This isn't so much new rock, as it is unheralded: