I don't use specific songs for.
Songs i'd pick for myself are
Blues Company - Invitation to the blues is also a great piece of musicality.
Keri Noble - Last Warning
Esperanza Spalding - Ponta de Areia
Allen Taylor - Chimes on midnight
Geoffrey Oryema - Makambo
Kari Bremnes - Spor (2015)
Sara K. - Don't i know you from somewhere?
Jan Gunnar Hoff - Living
Evanescence - Hi-Lo from Synthesis
Evanescence - Lost in Paradise from Synthesis
Alex Christensen ft. The Berlin Orchestra - Listen to your heart ft. Medina ( I like her voice and passion)
Alex Christensen ft. The Berlin Orchestra - Redemption
Lindsey Stirling - Love's just a feeling (Brave enough) - Like the whole album
Charlotte Cardin - Paradise Motion, Dirty Dirty, Like it doesn't hurt - for some reason

Alex Clare - You'll be fine
Ages Obel - The Curse
London Grammar - Hell to the Lairs, Who am I
Medina - Scars
Simply Three - Maverick, Heart's Harmony
Unleash the archers - Awakening, Apex, Going down fighting
Several Nightwish songs.
Happy listening and have a great day.