After making the OP, I would like to give my thoughts as well. I feel Jagr is the best offensive player of the 3. In his prime he was both an elite goal scorer and playmaker. One interesting tidbit is that Jagr has 5 seasons where he was in the top 5 in goals and assists (his 96, 99, 00, 01, and 06 seasons). That something Sid and Ovie have never done. While Jagr didn't start as an elite offensive player right away, when he did, he never looked back. from around 95-01, Jagr was a offensive force of nature.
I struggle who was better between Crosby and Ovechkin offensively.
On one hand, Sid, on a per game stance, has been better than Ovie. He's behind Ovie by 15 points in 168 fewer games. He has the lead the league in all of goals, assists and points, and never finished below as a PPG player, something Ovie has done in a few occasions.
On the other hand, Ovie's highs were higher than Sid's. 3 straight 50+ goals and 100+ point seasons is nothing to sneeze at. Another plus for Ovie is that his specialty in goal scoring. 9 rockets and 8 seasons of 50 or more goals is incredible. Compare that to Sid assists totals, only leading the league in assists 1 time and hitting the 70 assist barrier two times. When it comes to their specialty, Ovie was that much better in comparison to Sid.
I didn't vote because I'm struggling who was the better offensive player between Sid and Ovie, but Jagr is the best out of the 3 for me.