1: Fenton Crackshell from "Duck Tales".

https://furienna.files.wordpress.com/2015/07/01.jpg

2: Edd a k a Double D from "E, Edd & Eddy"

https://furienna.files.wordpress.com/2015/07/02.png

3: Hermione Granger from "Harry Potter"

https://furienna.files.wordpress.com/2015/07/03.jpg

4: Steve Urkel from "Family Matters"

https://furienna.files.wordpress.com/2015/07/04.jpg

5: Belle from Disney's "Beauty & the Beast"

https://furienna.files.wordpress.com/2015/07/05.jpg

6: Carl Cryssinovicz from "Johnny Bravo"

https://furienna.files.wordpress.com/2015/07/06.png

7: Dexter from "Dexter's Laboratory"

https://furienna.files.wordpress.com/2015/07/07.jpg

8: Myra Monkhouse from "Family Matters"

https://furienna.files.wordpress.com/2015/07/08.jpg

9: Gyro Gearloose from "Duck Tales"

https://furienna.files.wordpress.com/2015/07/09.jpg

10: Jane Porter from Disney's "Tarzan"

https://furienna.files.wordpress.com/2015/07/10.jpg

11: Mark Foster from "Step by Step"

https://furienna.files.wordpress.com/2015/07/11.jpg

12: Dana Foster from "Step by Step"

https://furienna.files.wordpress.com/2015/07/12.jpg

dont forget
Arnold Horshack welcome back kotter
lemont form sanford & son
vent form mama's family
paul fifer form the wonder years
minkus form boy meets world
fred form i love lucy
norton form the honeymooners
flex form the odd couple
'Screech'form saved by the bell
Steve Urkel form family matters
posties from happy days

As you can see, I updated my list, and you can find Steve Urkel at 4th place. I'm not familiar with anyone else on your list except for Screech from "Saved by the bell", and I know too little about him too to put him on my list. I now regret though that I found no place for Carlton Banks from "Fresh Prince". How could I forget about him?