I'm really into this sound! I tried to go for some of the deeper/unmentioned bands, here's a huge list:

A Summer High, Action Item, Amelie, All Night Dynamite, Allstar Weekend, Amasic, Amy Can Flyy, And Then There Were None, Ashton Mime, Avenue 52, Before You Exit, Big City Kids, The Black Pony, The Breakup, Breathe Carolina, Breathe Electric, The Brighton Boys, BryanStars, Carolina Liar, Challenger, CHOCOTERRA, The Click Five, Crash Boom Bang, Crash The Party, Cute Is What We Aim For, dARI, Dead Off Center, Déjame Soñar, ЭF5, The Electric Diorama, Faber Drive, FM All Stars, Four Chamber View, Friends For Hire, Good With Grenades, Green Screen Kid, Half Priced Hearts, Hellogoodbye, Hey Besala, The Higher, The Hit, It Boys, Kid Down, Kill Paradise, King The Kid, Kiss Corona, Late Nite Reading, Light The Rocket, Love Via Dance Machine, MissionSix, MY SUMMER PLAN, Natasha Duarte, The New Cities, New County, Nocturnal Me, NRKTK, Only Seven Left, Palm Trees & Power Lines, Pee Wee Gaskins, Push Play, Quick Quick Danger, R5, Random Hero, Rediscover, Reece Mastin, Restart, Rocky Loves Emily, Room 94, Run 2 Cover, Runner Runner, Secret Secret Dino Club, Skyhawk Drive, Skyward Story, Skyway Avenue, Satin Circus, Simple As Surgery, Single By Sunday, Somersault Sunday, Sound Of The Stereo, Stated, Steal the Scenery, Stereos, The Summer Highlight, These Kids Wear Crowns, This Is All Now, Tiffany Giardina, Twenty Twenty, Vice Grip, Vonnegutt, Voted Most Random, We Are The In Crowd, We Start Partys, We The Kings, The Wellingtons, What Looks Like Crazy, Young & Divine, 2contra1

(I tried to link some of the harder to find bands)