Like if you are heavily losing and your whole team fed except for you, which champ can hold a tower for nigh forever? Anivia comes to mind, or perhaps Nasus might work? --- Not happy with committing just murder, he had to go and dirty the courthouse, too!? GUILTY - Judge
None can. If all your teammates fed the enemy team (there are now 4 guys on the enemy team with way more gold and levels than you), then they will dive you if you stay near the tower, then kill the tower.