Take back the Waterfront District for the Thieves Guild.
One such questline revolves around Mazoga, the so-called knight, and the Count of Leyawiin.
Its better to deal with the spellcaster first before moving on to the others.
Oblivion Remastered: Knights Of The White Stallion Quest Walkthrough
Here is how you can complete the Knights of the White Stallion quest in Oblivion Remastered
