Ohmura is great, and his technique is easily the best I've seen, but he can be a touch robot at times. Most of his influence is from Malmsteen, obviously. There seem to be lots of Malmsteen clones, especially in Japan. Not exactly sure why. My favorite album from Ohmura is his Emotions in Motion album. It's very well put together, and he's able to reserve some shred, unlike some certain guys.
Some more guys to check out:
Stephan Forte (Adagio)
James Malone (Arsis. He shreds AND sings)
Muhammed Suiçmez (Necrophagist)
Christofer Malmström (Darkane)
Lord Tim (Dungeon/Lord. Awesome power metal bands)
Gus G (Firewind)
Rob Marcello (Danger Danger and a bunch of others. Totally 80s!)
Mattias IA Eklundh (Freak Kitchen. Probably the most hilarious shredder ever. Easily the best usage of harmonics in guitar playing)
Talk about oldschool here! 30+ minute youtube video!
Mattias Eklundh - Freak guitar demoThen there are people like Greg Howe, Marco Sfogli, Guthrie Govan, Andy Wood, etc. that aren't metal, but they're ridiculous guitarists.