Whenever I will be going to Orlando (And every time I go I do Universal), I always get an Uber or Lyft from MCO to wherever I'm staying at. There are three different levels at the pick-up and drop-off and usually the rideshare is always at the middle platform (If I remember correctly).
Other than good ol' Uber or Lyft, I don't really have any extra recommendations. My experience with rideshare from MCO has been pretty straightforward.