How do you want your format to be paced? BUG is probably the least aggro color combination you could come up with. What roles will the different colors play in such a setting?
Low removal too, as something to consider.
Some sort of Golgari aggro is probably possible, with gravecrawlers and E1 as a base, with strangleroots and other chaff bringing up the rear, but it will lean towards the midrange-y part of the spectrum.
The removal thought was something like this:
cc1: not much
cc2: conditional removal, along the lines of terror, ultimate price, etc.
cc3: unconditional removal, murder, hero's downfall etc.
The roles of the colours are defined in the post with the different themes that are on the previous page, with some of them already thrown out. I'll make an updated list of what they can do, once I have purged some more.