I love Metallica and Disturbed! Its honestly interesting how easy genres can change over the years, so I don't know if some of my favorites are heavy metal exactly, but probably pretty adjacent I also love all genres XD I could talk music forever <3
But some of my favorites are; Korn, Eths (A French metal band super good, her voice is amazing!), In This Moment, Jinjer (also her voice is sooo good <3), Guns N' Roses, Attila, Upon a Burning Body, and I could go on XD
Edit: Also! I decided to throw in Van Canto, they are a German acappella metal band which I always thought was kind of cool :3
As I Lay Dying, Acid Bath, Bring Me The Horizon, Erra, Nine Inch Nails, I Prevail, Ice Nine Kills, Polaris, Pierce the Veil, HIM, Lacuna Coil, Nightwish, Tool, Slipknot, Breaking Benjamin, Disturbed, really that whole era of nu-metal, i just.
Bring Me the Horizon and Korn! I also like a youtuber who does heavy metal versions of popular songs. His channel is called Frog Leap Studios. I do believe he has a band too but I'm not 100% sure.
...I'm mostly into metalcore, so your mileage may vary on if that counts, but refer to my music scene spreadsheet. Yes, I'm the kind of guy who keeps my music in a spreadsheet. Basically, anything affiliated with scenemo canon, and also a decent chunk of nu metal.