As far a commonalities, none of us particularly enjoy the gods. We have one guy who wants to build his own, one guy who wants to kill them all, and one who wants to eventually become one (me), I have no idea about the other two players, so far.
And speaking of Vecna, I doubt he'd have an issue helping to kill the other gods as a power play for himself. He's been everything from a mortal, to nearly an Overgod, and back again more than once in his history, and has either survived or self-resurrected himself after his deific death at least three times i know of.
Arias, is what you've posted all that you have done regarding that elder evil? I'm having a hard time reconciling my character worshipping anything but an elder evil at this point, and may be jumping on your bandwagon.