To appeal to a crowd, I would suggest a Cream Ale, Wheat Beer, Blonde Ale, Irish Red, or maybe an APA. If you want a seasonal offering, a pumpkin ale would be perfect timing.
In experience from recently brewing for a wedding, make sure to have a few offerings as you will have a mix of beer drinkers. The cream, blonde, irish red, and maybe even the pumpkin ales would appeal to your non-craft drinking types while an APA or an IPA would appeal to the craft beer drinking crowd--though I would probably drink each one if I went to a wedding with a bunch of homebrew offerings.
I mean really its your wedding, so brew to your tastes and what you like as its your day and your event, so show your family and friends what you love to do. That being said, to appeal to all the types of beer drinkers, a cream ale and an APA would hit all marks and make everyone pretty happy.