For a mainstream boss example I nominate the Lonely Giant in Elder Scrolls Online.
There also are plenty of cute-animal mobs that weren't going to bother you unless you started something. An example that still stands out for me is the first set of sleeping bears in LOTRO.
There also are plenty of cute-animal mobs that weren't going to bother you unless you started something. An example that still stands out for me is the first set of sleeping bears in LOTRO.