Big muscle gals would be my vote, not surprisingly, but I think it would be fun to see different styles of bulk. Like some that are taller and more "even" in terms of mass, others could be more chest or bicep focused, things like that. Not that I wouldn't mind seeing dudes too of course.

Species that aren't often used with muscle could be fun too, like sea creatures other than sharks or orcas (maybe an eel or barracuda?). "Soft" mammals like minks, chinchillas, rabbits, etc, are often fun too. Avians as well, like corvids, jays, hawks, etc. Just throwing out random thoughts XD

Big thanks for input, gonna consider different styles of bulk too :D

Muscle babes with big arms and big tits are always good

Indeed :D

I have had the thought of a orca+orc or Orc-Agh just because of word play. Elves aren't usually muscular but Oeda from that Elf can't diet manga sure is cut.

Didn't think about races beside mammal anthros. Thanks for idea :D

How about a human ninja with some cybernetic legs that can change size on command?

a muscle gobbo would be cute.

Kitsunemimi >.> All the Kitsunemimi designs...

But more seriously others have given good ideas.
Taur types, robotics, bonded characters, or just super-science looking results are less commonly seen adopts but could work.

Word of advice, while a design is always good, what people love are 'ideas'

That is, cute design octopus? Good. Cute design of a octopus AND she's a pirate? Even better.