Try Justin Ho from all music. Cool dude and so inspiring that merely looking at him makes u play like a god 8)
Seriously though, he does know how to carry himself in a way that strives to improve your skills. He plays all sort of styles too, from jazz to slayer type metal.
A graduate from Berklee School of Music. 'Nuff said? :wink:
Oh yes if you wanna learn from Yamaha, electric guitar courses are carried out at Plaza Singapura only. Be sure you choose to go for individual lessons. Those group ones are really bad cause everyone is whacking power chords on their guitars and you can't really hear yourself at all. I'm speaking from personal experience here.