That's not really an easy question to answer since metal has spawned so many subgenres over the decades and the last time I really paid attention to modern metal in the mainstream was when bands like Lamb of God had their heyday.
I'd say Mastodon, Baroness and Meshuggah are pretty good and well-known examples here even though I wouldn't call them straightforward (that would apply to bands like Avenged Sevenfold and Slipknot, bands I don't really like). Other than that you have so many bands that keep said subgenres alive and well to this day, be it as a copy of the older bands or with a more modern approach and encompassing more styles.
Many people would also name Opeth as a modern example but I don't listen to them and therefore can't comment on that.