I currently have 36 characters who have been mentioned but do not have 5+ nominations. I know some are one-time characters, but most of these are not. If you see something missing for these guys that's worth noting, speak up!
GRANPA MARSH
Trying to kill himself in "Death"
Banging the Romanian quintuplets' mother in "Quintuplets 2000"
Wanting to keep his license in "Grey Dawn"
SHEILA BROFLOVSKI
Making Kyle take his little stereotypically-Jewish cousin to school in "The Entity"
Singing "Blame Canada" in "South Park: Bigger, Longer, and Uncut"
Unleashing her Jersey-side in "It's a Jersey Thing"
TWEEK TWEAK
Freaking out over the Underpants Gnomes in "Gnomes"
Fighting Craig with his new boxing skills in "Tweek Vs. Craig"
Becoming "the new friend" after Kenny actually dies in "Professor Chaos"
Looking for his happy place in "Free Hat"
BEBE
Having her fingergun-fight with Wendy in "The List"
Growing breasts in "Bebe's Boobs Destroy Society"
CLYDE DONOVAN
Being Cartman's next-fattest replacement for the sled race in "Cartman's Silly Hate Crime 2000"
Ditching World of Warcraft for looking at a Playboy magazine in "Make Love, Not Warcraft"
Believing he's hot in "The List"
GOTH KIDS
Converting Stan to their goth-ways in "Raisins"
Dancing with Stan in "You Got F'd in the A"
Burning down a Hot Topic to stop the vampire-kids in "The Ungroundable"
Giving a speech about the differences of goth and emo at the end of "The Ungroundable"
THAD JARVIS
Playing acoustic in "Guitar Q****-O"
STARVIN' MARVIN
Being shipped to America along with a watch in "Starvin' Marvin"
Flying into space in "Starvin' Marvin in Space"
PIP
Losing his temper to make him excellent at dodgeball in "Conjoined Fetus Lady"
Living through the Great Gatsby in "Pip"
Being crushed by Mecha-Streisand in "201"
MINTBERRY CRUNCH
Saving the world in "The Coon Trilogy"
PRINCIPAL VICTORIA
Convincing Wendy to fight Cartman in "Breast Cancer Show"
MS. CHOKSONDIK
Teaching her class it's okay to grow older in "Fourth Grade"
Scaring her all-girl class about sex in "Proper Condom Use"
Having sex with Mr. Mackey in "Proper Condom Use"
Dying by choking on semen in "The Simpsons Already Did It"
MR. SLAVE
Taking Lemmiwinks into his body mid-class in "Death Camp of Tolerance"
Shoving Paris Hilton into his ass at the end of "Stupid Spoiled Whore Video Playset"
BIG GAY AL
Helping Stan understand the gay lifestyle in "Big Gay Al's Big Gay Boat Ride"
Singing "I'm Super, Thanks For Asking" in ""South PArk: Bigger, Longer, and Uncut"
Leading the Boy Scouts in "Cripple Fight"
Asking if Mr. Slave ordered pizza when Ms. Garrison arrives in "Follow That Egg"
CHEF'S PARENTS
Fighting with the Loch Ness Monster over "tree fitty" in "The Succubus"
Using voodoo in "The Biggest Douche in the Universe"
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Nominate E P O N A.