Reset 2014
Inoccent man
Queen in-hyun's man
Hana yori dango
Ando Lloyd
One pound gospel
Bad boys j
Pride
Karma rider
yamato nadeshiko shichi henge
Those are some that come to mind
"Kill Me Heal Me",  "Protect the Boss", and possibly "Secret" -- Ji Sung is great at playing eccentric characters :P
Nodame Cantabile
Suzuki Sensei
Hanzawa Naoki
ST ~ Aka to Shiro no Sousa File
The King of Dramas
Saikou no Rikon

Kounodori, Dr. Rintaro, Satorare, JIN are eccentric good doctors with kind personalities, so not sure if they fit the other characters.
Is there any way I can follow your list OP?
Kill Me Heal Me :) here we have 7 different personalities of the male lead... If that's not eccentric I don't know what is. Enjoy ^^
 Winnie:
You can try Kazoku Game - eccentric/quirky male lead. 

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