I recommend Vocaloid music. Vocaloid is a computer software which comes with an artificial voice which can be used as a synthesizer. Sure if you're not into it, the voices are represented as anime characters, but the music can be very deep and truly expresses the emotion of the writers and composers. I believe Vocaloid music can deliver an experience like no other. You feel a true connection with other fans, because the idols are not human. Most songs are not commercially moved, so it really makes way for much creation and expression. I recommend the 6 main Crypton Vocaloids. They are Hatsune Miku, Rin Kagamine, Len Kagamine, Meiko, Kaito, and Luka Megurine. I will list some songs now.
Hatsune Miku
-Black Rock Shooter
-Cantarella (This features Kaito)
-Chaining Intention
-Clover Club
-Colorful x Melody (This features Rin Kagamine)
-Dance of Many
-Eh? Ah sou
-Electric Angel
-Hajimeteno Koi Ga Owarutoki
-Hajimete No Oto
-Hatsune Miku no Gekishou
-Hatsune Miku no Shoushitsu
-Heart Breaker
-Himitsu Keisatsu (Sometimes called in the English-speaking Vocaloid community, "Secret Police")
-Hinekuremono
-Jugemu Shiikensaa
-Kocchi Muite Baby
-Kogane no Seiya Sousetsu ni Kuchite
-Koi Ha Sensou
-KuruKuru Mark No Sugoiyatsu
-Magnet (This feature Megurine Luka)
-Matryoshka (This one also has a non-Crypton Vocaloid, GUMI)
-Melt
-Miku Miku Ni Shite Ageruﾂ?ｴ
-Nightmare Party Night
-Promise (This features Rin Kagamine)
-Rollin' Girl
-Romio and Cinderella
-Senbonzakura
-Sing & Smile
-Sono Ichibyou Slow Motion
-Strobe Nights
-Tell Your World
-Time Machine
-Torinoko City (Sometimes called in the English-speaking Vocaloid community, "Left Behind City")
-Tricolor Airline
-Unhappy Refrain
-Uraomote Lovers
-Usotsuki No Parade
-Weekender Girl
-The World Is Mine
-World's End Dancehall (This features Megurine Luka)
-Yellow
-Yumeyume
-39
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Rin Kagamine
-Gemini (This feautures Len Kagamine
-Iroha Uta
-Melancholic
-Meltdown
-Migikata No Chou (Sometimes called in the English-speaking Vocaloid community, "Butterfly On Your Right Shoulder" Also, there are two versions, the Rin Kagamine version, then the Len Kagamine version.)
-Rimokon (This features Len Kagamine)
-Tokyo Teddy Bear
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Len Kagamine
-Migikata No Chou (Sometimes called in the English-speaking Vocaloid community, "Butterfly On Your Right Shoulder" Also, there are two versions, the Rin Kagamine version, then the Len Kagamine version.)
-Fireflower
-Monochrome Dream Eater
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Kaito
-Ashes To Ashes
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Meiko
-Nostalogic
-Stay With Me
-Colorful x Sexy (This features Megurine Luka)
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Megurine Luka
-Double Lariat
-Dye
-Just Be Friends
-Luka Luka Night Fever
-Megane
-No Logic
----SPECIAL CASES-----
-Acute (This song is sung by Hatsune Miku, Kaito, and Luka Megurine)
they are both kinda... indie, light rock, electro(?) but they are really good. like first time i heard school food punishment i was like "O.Owhere have you been all my life?" 
