Top 5:
1.Opeth
2.Tool
3.Deafheaven
4.Deftones
5.Gojira
Others include:
Aesop Rock
Agalloch
Alice in Chains
Between the Buried and Me
Celtic Frost (Monotheist)
Chelsea Wolfe
Chevelle
Clipping
Converge
Daughters (You Won't Get What You Want)
Death Grips
Dillinger Escape Plan
Emperor
Epica
Green Day
Have a Nice Life
Ihsahn
Katatonia (Brave Murder Day)
King Crimson
Linkin Park
Loathe
Mastodon
Machine Head
Meshuggah
Metallica
Oathbreaker
Offspring
Pallbearer
Panopticon
Porcupine Tree
Puscifer
Radiohead
Rotting Christ
Slipknot
Smashing Pumpkins
Swans
Triptykon
Windhand
Zeal & Ardor
Not an exhaustive list! I started with alternative rock in high school, got into extreme and progressive metal in college, and after college Death Grips got me into Hip Hop and experimental music. The majority of what I listen to will probably always be metal though. I just find it the most consistently enjoyable genre by far.