I prefer to say that I speak with confidence, but call it "arrogance" if you wish.
Nobody was close to Taylor, in either field, during Taylor's dominance. In 1997, Taylor beat Burnett (the 1995 BDO World Champion) 4-1 in sets, averaging well over 100. In 1999, the two world champions met in a challenge match, with the chance of winning £60,000 and all the bragging rights. Taylor beat Barneveld 21-10 in legs over 60 minutes of play. The other challenge match between the two world champions was in 2004, with Taylor beating Fordham 5-2 in sets.
The people who use that argument of split fields completely miss the point that Taylor won 2 world titles in 1990 and 1992, when there was still a unified field. At that time, Taylor was certainly not as good as he would become in the future. Taylor's average in the 1992 World Championship final of 97.59, is still the best ever average in a BDO World Championship final, to this day. That's been beaten a lot of times in the PDC World Championship finals.
Oh god give it up - we are talking about Sports! Darts is a pub game played by drunken, middle-aged men in the dark corners of bars around Europe. I don't think darts requires any stamina, endurance, strength, power, agility, or creativity. No doubt Phil Taylor is impressive at throwing a dart at a certain point from 9 feet. But you have got to be kidding me that you are legitimately saying he is the greatest sportsman of all-time? of all sports? He would have been the kid who you picked LAST in Physical Education football in ninth grade. You're turning this thread into a joke.
My pick goes to Jordan, Ali, or Bradman.
Jordan because he was the best in a sport that has the best athletes IMO.
Ali because he was Ali.
Bradman because statistically he just doesn't make sense. Maybe Gretszky comes close, but Bradman's numbers are more phenomenal even still.