A bunch of Killjoys stories that I think fit what you're asking for. (The order is more-or-less chronological.)

gala_apples: How To Raise A Resistance Fighter (Grace-centric gen; 2,690 words) original rec

paperclipbitch: Shut Up And Let Me See Your Jazz Hands (Gerard-centric with a little Frank/Gerard at the end; 3,850 words) original rec

were_duck: Keep Running (Frank/Gerard, Gerard/Korse, Frank/Gerard/Korse; 8,220 words) original rec

zarathuse: Measured Out in Miles (Grace-centric gen; 2,810 words) original rec

turps: And the Embers Never Fade (Bob-centric MCR GSF; 45,460 words) original rec

tuesdaysgone: Hold Your Heart Into This Darkness (Frank/Gerard, Gerard/Korse, Mikey/Ray; 91,640 words) original rec

sometimesophie: No One Wants To Die (Gerard-centric gen; 4,070 words) original rec

the9thdoctor: Angels From the Neon (Frank/Gerard sort-of; 44,790 words) original rec

sassbandit & were_duck: Draculoids Will Never Hurt You (Frank/Gerard, Mikey/Ray/Show Pony, many others; 94,440 words) original rec

gorgeousnerd: Giving Up the Ghost (Bob-centric Bob/Gerard, Mikey/Pete; 26,550 words) original rec

turps: A Spark Set to Flame (Gerard-centric, past Gerard/Korse; 14,730 words) original rec

kopperblaze: City Boys Don't Drive Fast Cars (Gerard-centric, a little Gerard/Show Pony; 7,200 words) original rec

akamine_chan: War (Gerard/Korse; 5,050 words) original rec

gorgeousnerd: It's a Small World After All (Gerard-centric, a little Gerard/Deadmau5; 15,610 words) original rec