The first two albums of Ritchie Blackmore's (of Deep Purple fame) project Blackmore's Night blew me away,

Debut album: https://www.youtube.com/watch?v=L3_Uo3mr30A&list=OLAK5uy_muz...

Check out Play for me Minstrel play, a duet with the singer of Jethro Tull on the flute. Starts quiet but later they start shredding on flute and guitar unisono.

Second album: https://www.youtube.com/watch?v=Ttqnz-xnwWM&list=OLAK5uy_k7d...

Check out Spanish nights.