...at least, I think it's a greater yellowlegs! Turns out that identification is pretty darned difficult, and maybe someone here will be able to more positively figure this one out.
First, I have very little reference for this individual's relative size, this being my first time seeing any number of yellowlegs. However, I've settled on "greater" due to the bill length, the bill's color and the length of the primary feathers relative to the tail. Small indications I gathered off a website (https://www.thespruce.com/greater-or-lesser-yellowlegs-386349).