I am horrible with names so I'll just name the bands.
Opeth
The Mars Volta
Primus
Moros Eros (for mellow days)
The Locust
The Dillinger Escape Plan (I'm afraid to listen to the new album

)
Greg Howe is like woah...
Zappa is zappa 8)
Psyopus (these guys are just wow, the singer is meh but fuckin a wow)
Steve Morse, gogo the clap, fuck you highland wedding.
Old school 80's metal stuff is good, but not my style. Stuff like Cacophony and uhh Marty Friedman are all respectable but eh... It's all guitar, the drums and vocals are ball sandwhiches if they even have vocals.
FYI Fuck Malmsteen.