and when I say "our generation" I mean musicians who range from the early to mid 20s to thier early to mid 30s.
That is silly to define this in terms of the age of the artist. You can define the generation in terms of this age range, but then it still comes back to which artist is the most important to that generation, not whether they fall within that age range.
Anyway, my answer is David Guetta. The reason is that history will look back on this generation as the generation where electronic music infiltrated all other types of music. And electronic music is the genre where the most rapid and significant developments have been made.
And although I don't consider David Guetta to be the best EDM artist out there -- I prolly wouldn't even put him top ten -- you can't deny the influence that he has in producing music in other genres (mainly pop music and hip hop) that injects EDM into the mainstream.
For that reason, he gets my vote.