Was actually talking about this with a friend the other day!Logos Prime is right there, but I always wished he'd had a different color scheme rather than being a repurposed Soundblaster. Imagine something like Production Noisemaze?
It is weird that a character like Logos Prime is just Soundblaster, but it's probably the only reason he got to exist.
IIRC Soundblaster from Cybertron Soundwave was a fairly straightforward redeco idea Takara wanted to get out there, but they were also doing some Beast Wars reissues. They wanted some exclusive fiction to set up Primal and Megatron meeting again in their OG Beasties bodies so they made their new Soundblaster release happening around the same time a Vector Prime-esque ancient timey wimey dude.
Basically a sorta precursor to the Legends manga where there's fiction just grabbing whatever happens to be coming out and weaving a story- any story- out of them.
I could see Logos getting a much needed revamp colour-wise if he'd ended up on the official Thirteen

As-is though he's stuck in a weird in-between in more ways then one. A Prime character with very Thriteen-esque powers but... not. And stuck with Soundblaster's colours for... reasons.