How do you get someone to follow you in oblivion

At the end of the dark brotherhood questline when you are the listener, the sanctuary will be repopulated by up to three generic assassins. You can get one, and only one, to follow you. They can follow, wait, follow invisible and follow you as fast as you are going. At the end of the mages guild questline you can order one mage student to follow you from the arcane university. They don't have as an elaborate order system as the assassins, with only follow, wait or go away. When you are the grand champion in the arena there will be someone called "Adoring Fan" outside who basically worships you. If any of these people die, they will continuously respawn at their respective locations.