The Fs:
Flex Mentallo - o, i (less than 20)
Flinch - o, i (less than 20)
Final Crisis and Forever Evil both have tabs i, o, v and should probably have the volumes and omnibus tabs switched.
5 Likes
The Gs:
Gotham Academy - v, i (less than 20)
Green Lantern (2005-2011) o, i
Green Lantern Corps: Recharge - o, i (less than 20)
Green Lantern Rebirth - o, i (less than 20)
5 Likes
The Hs:
Hardware (1993-1997) - o, i
Harley Quinn and Power Girl - o, i (less than 20)
He-Man/Thundercats - v, i (less than 20)
Hitman - v, i, o
5 Likes
The Is:
Icon - o, v, i
Infinite Crisis - o, i (less than 20)
Infinite Crisis: Fight for the Multiverse - v, i, o
Infinity Inc. (1984-1988) - v, i
Invasion! - o, i (les than 20)
5 Likes
The Js:
Joe the Barbarian - o, i (less than 20)
Jonah Hex (no date but the 2010 series) - o, i, v
Justice League: Gods & Monsters - o, i (less than 20)
Justice Society of America (2007-2011) - o, i, v
Jack of Fables and Justice League (2011-2016) both have tabs i, o, v and should probably have the volumes and omnibus tabs switched.
5 Likes
Only one K:
Kid Eternity (no date in title but the 1991 mini-series) - o, 1 (less than 20)
5 Likes
The Ls:
Last Gang in Town - v, i (less than 20)
Legion of Super-Heroes (1989-2000) - v, i, o
Legion of Super-Heroes (2010-2011) - v, i, o (less than 20)
Lobo (1990) - v, i (less than 20)
Legion of Super-Heroes (2005-2009) has tabs i, o, v and should probably have the volumes and omnibus tabs switched.
5 Likes
The Ms
Mad Magazine (the original series) - v, o, i
Man-Bat (1996) - o, i (less than 20)
Masters of the Universe - v, i (less than 20)
Mister Miracle (1971-1978) - o, i
5 Likes
The Ns:
Northlanders - v, o, i
Nightwing (2016-) has tabs i, o, v and should probably have the volumes and omnibus tabs switched.
5 Likes
No Os.
The Ps:
Planetary/Batman: Night on Earth - o, i (less than 20)
Poison Ivy: Cycle of Life and Death - v, i (less than 20)
Power Girl (2009-2011) - o, i
Prez (1973) - v, i (less than 20)
Prez (2015) - v, i (less than 20)
Planetary has tabs i, o, v and should probably have the volumes and omnibus tabs switched.
5 Likes
No Qs.
The Rs:
Red Hood/Arsenal - v, i (less than 20)
Red Hood: The Lost Days - o, i (less than 20)
Resurrection Man (2011-2012) - v, i (less than 20)
5 Likes
The Ss (a bit long):
Scalped - v, i, o
Scooby Apocalypse - v, i
Seaguy - o, i (less than 20)
Sinestro - v, i
Sixpack and Dogwelder: Hard Travelin’ Heroz - v, i (less than 20)
Static (1993-1997) - o, i
Static Shock - v, i (less than 20)
Super Powers (1984) - o, i (less than 20)
Super Powers (2016-2017) - v, i (less than 20)
Superman: Secret Origin - o, i (less than 20)
Superman: The Death of Superman - v, o, i (less than 20)
Swamp Thing (1982-1996) v, i, o
Swamp Thing (2000-2001) v, i (less than 20)
Shade, the Changing Man (the 1990 series), Supergirl (2005-2011) and Superman (1987-2006) all have tabs i, o, v and should probably have the volumes and omnibus tabs switched.
5 Likes
The Ts (another longer one):
The Atlantis Chronicles - o, i (less than 20)
The Batman Adventures: Mad Love - o, i (less than 20)
The Dark Knight Returns: The Last Crusade - v, i (less than 20)
The Fall and Rise of Captain Atom - o, i (less than 20)
The Filth - o, i (less than 20)
The Flash (1987-2009) - o, i
The Invisibles - v, i, o
The Lost Boys - v, i (less than 20)
The Odyssey of the Amazons - o, i (less than 20)
The Omega Men (2015-2016) - o, i (less than 20)
The Secret Society of Super-Villains - v, i (less than 20)
Transmetropolitan - v, i, o
The Demon (1993-1995), The Green Lantern Season Two, The New Titans, The Sandman and Trillium all have tabs i, o, v and should probably have the volumes and omnibus tabs switched.
5 Likes
Only one U
Unfollow - v, i (less than 20)
5 Likes
The Vs:
Vinarama - o, i (less than 20)
Voodoo (2011-2012) - v, i (less than 20)
5 Likes
The Ws:
WE3 - o, i (less than 20)
Watchmen, Wonder Woman (1987-2006) and Wonder Woman (2006-2011) all have tabs i, o, v and should probably have the volumes and omnibus tabs switched.
5 Likes
No Xs or Zs so the Ys are the last.
Young Justice (1998-2003) - v, i, o
Young Justice (2011-2013) - v, i, o
Y: The Last Man has tabs i, o, v and should probably have the volumes and omnibus tabs switched.
4 Likes
My hat is off to you @idle453.87595, I can tell you put alot of time & effort to find the errors in Alphabetical orders! 
2 Likes
Just the easiest way to make sure not to miss too many.
3 Likes
The Sandman: Overture #2 is a duplicate upload of the special edition of that issue, which is a pain because the special edition features in progress art instead of the completed work.
4 Likes