I would suggest two underground bands I just discovered some weeks ago
DEAMENSION
(I'm a fan)(oh wow a really good guitarist, I can hear coz I'm a guitarist myself (He is so much better than I am) I could never do his solos.., Vocals are amazing, they only just posted 1 demo and demo previews, but I don't run into that much potential a lot, they deserve more attention..A demo that is already so powerful and sort of catchy..never getting bored...lots of effort put into the lyrics as well which are strong and full of anger and power., really nice people as well i discovered when I spoke to them on facebook..I'm sure they would love some support and facebook likes https://www.facebook.com/deamensionband )*
remember it's a demo and hear the potential--->
https://www.youtube.com/watch?v=mCuoeErllOQ&feature=youtu.be
ECOCIDE
(like semi/or not anymore underground, they are slowly getting more and more attention, little bit more technical than DEAMENSION and a really old scool death sound, but i personally like the vocals and the melodic inspired riffs of DEAMENSION more...and yeah honestly you shouldn't really compare the two..because they are both brilliant in their own sort of way..you should decide what you like more..or like both.. But ECOCIDE is like many steps further in the 'heading towards the professional' process, they recorded songs and have gigs with good bands, but every band likes support anyway ) this is good recording quality-->