I am also not a fan of super growly vocals. There’s a lot of stuff I love musically but the vocals put me right off. I’d listen to bands like Opeth and Beyond the Buried and Me more often if the growls weren’t present.
If you’re looking for metal with cleaner singing, I second the suggestions for Unleash the Archers and Nightwish. I can also recommend Blind Guardian, though the singer’s voice is polarizing. One of my favorite metal singers is John Bush from Armored Saint. He also did a few albums with Anthrax in the 90s.
For instrumentals, I can’t recommend much aside from guitar virtuosos like Steve Vai. Occasionally bands will release instrumental versions of their songs as B-sides, bonus discs, etc. Might be worth checking into.
Wow, that is a deep cut. I remember playing it (I think I still have the cart) but I barely remember anything beyond enjoying it for a bit.