Ruin Explorer
Legend
That's... unlikely. If there's say, a Paladin, for example, there's absolutely no way the Fighter is going to win that one (especially not in the level 1-10 range). And a Rogue will likely drop the Fighter before the Fighter has even finished killing the Wizard or Cleric barring some amazing DPS burst (which Fighters can sometimes do, with the right subclass and Feats).But afterward, the Fighter can mop up the rest of the party.
In fact, it's hard to think of a party that couldn't burn through the Fighter's HP (including Second Wind(s)) before he could kill two party members.
What you have to remember is the Fighter has no ability to 1v1 people, whereas the Wizard in question was able to split them up and do that (if I understand correctly). It's immediately 1v3 with the Fighter, so the Fighter has to take 100% of the DPS and CC of three characters until he kills the first, the of two characters, and so on.