Do we even know all of them, or just a few? I ask because I love the weird, overwrought lines like "goblet of strife" and "boastful fist".
I believe Aaron wrote the ones that were on the official TF site back when Energon was the mainline. You might remember the description for Grimlock being 'armed to the nines' despites not having anything resembling a weapon. I think Forrest Lee has written the bios since the start of Cybertron.