For a longtime casual recreational skier, there are a lot of ways to choose the "greatest skier right now," and any of them will work. It's of necessity subjective.
For me currently, an older dude, the "greatest" right now is who has been inspiring me and aiding my skiing the most recently, at least that I'm conscious of.
So for me it would be Sean Pettit. His happy, compact, "cannonball"-like style is good for my skiing, as are the skis he designed and skis on, the Pettitor 120s. They make me joyful. They ski like he skis. Little (or big) versatile tanks. Maybe my favorite ski, right now and over the past few seasons. I can watch him do stuff on that ski - in my case mostly the directional stuff (though also the surfing stuff w/o the major tricks), and that floats my boat.
Some Freestyle magazine this year voted him the readers' choice #2 skier for this year, so I'm not far off.
And I love his big lines, powder lines and style on the snow, zoomba, charge.
A few years back, Ted Ligety had me so inspired, with his relaxed, natural style. (Even though Hirscher or Svindal were probably better all around at just racing.) So for a time, a while ago, my answer would have been Ted.
Before that it was Aksel Lund Svindal. (What a great name.) For his cross over to big mountain video from downhill and sg.
And before that, Seth Morrison. The Obsethed ski guy. The Man.