Ripto in the second Spyro game. Part of it was I had no idea what to do, so I was just running around trying to survive.
When I used to play Guild Wars, there was also Urgoz. The fucker took five hours to reach with a full party and you were lucky to survive up until then. I was playing a 1 hp necromancer, so I died pretty often on the way there. I was also the team's energy source, so of course he always targeted me when I was resurrected and my team struggled until I was up again. When I was down, everyone would follow except one of the rangers in the back, who thankfully resurrected everyone each time and got them out. After an hour and a half, where I'm surprised nobody left, we finally got him.