There's this uber-Borg from the computer game Elite Force II:
And of course we know Borg have different types of drone, such as tactical drones.
We've seen all sorts of humanoid alien Borg (Klingon, Bolian, Cardassian, etc) dont think there's ever been a non-humanoid Borg, certainly not in canon Trek. There was a wildstorm comic (A Rolling Stone Gathers no Nanoprobes, printed in their Star trek Special) when they tried to assimilate some Horta, but they had a little to much resistance. And Marvel did a comic called "Operation Assimilation" where some Romulans got assimilated.
Ro-Dan wrote:The Borg Queen is an alien. I mean, just look at that head!
Species 125 to be specific.
Ro-Dan wrote:But yeah, it would be cool to see a wide variety of "Borgified" aliens.
Art Asylum did a small assortment of alien Borg action figures "Borg Assimilation". There was a Klingon, Cardassian and Hirogen, they also planned a Ferengi but it never got released: