Recommend me some heavy stuff for workout

I lost my iTunes I had been building up over the past 5 years recently and so now Im having to go back and get my workout music again. The problem is I can't remember what I listened to since the last time I worked out was 3 years ago (yeah I know).

I want some heavy stuff but not like Pantera, Slayer, Slipknot. I listened to that stuff a long time ago but I just can't handle the screaming anymore. Ive got some Breaking Benjamin and Metallica but Im drawing a blank on some metal that they actually sing.

Throw me some names. TIA.