KerchSome of my favourites:
Joe Satriani
Canvas Solaris
Animals as Leaders
Scale the Summit
Pelican
ohhhh yes. saw them open up for coheed&cambria/circa survive a few years back. their live performance is 10x more impressive than on CD, which is still really good.
i listen to a lot more ambient/math-rocky instrumental bands, so i won't post those. but a good, instrumental, heavy-ish band is and so i watch you from afar. check out "the letters EP" to get you started.