Elder Alert Best Characters In Elder Scrolls 4: Oblivion To Kill?

Best characters in Elder Scrolls 4: Oblivion to kill? - elder alert

So, my little brother deleted my file and start again. Sucks ...
ESIV Which characters are not important in history or a mission at all and are easy to kill from the start, before escape and alert the guards. I do not wish for anyone to kill in any way involved in any of the missions. I want the guild of assassins. The names of certain characters, and where they will find very much appreciated.