I think an Argyle jacket looks fine with a bow tie, with or without a vest. (I'd opt for a black Argyle, of course). Here is a picture from my own wedding (escorting my mother to her seat)


Here's a more recent pic from a Burns Supper last year, showing the same jacket & bow tie, with a vest.


I'm not wearing a fly plaid in either instance; I don't like them in general. Aside from my personal preference I have no objection to them with an Argyle per se. But I think most are of the opinion that the fly plaid is typically worn with Prince Charlie or a more formal doublet.

I have, however, worn an Argyle with a half belted plaid for daywear and it's turned out nice. See:
http://kiltmaker.blogspot.com/2008/0...ats-plaid.html