Horse carriage driver
Yes, that’s a major gap. But it’s from the horse's mouth! It can even be more, depending on whether or not you own it (and are thus able to avoid fees). And of course, how many trips around the park your noble steed makes, weather, and time of day all play pretty enormous factors. Ideal scenario for most tips: sunny day + engagement in the carriage is a success + 15 trips minimum.
Now obviously, if you really bust your ass like this guy did, working 12-hour shifts five days a week, it can be closer to $85,000. But for the most part, shifts tend to be about half of that. Either way, given some of the terrible riders these guys have to endure, this could arguably be the worst deal in the city.