Well, IMO, I wouldn't be against seeing some of the ladies from the Sonic series. This could include new girls like Surge, Whisper, Tangle, or some long-time favorites like Sally, Nicole and Fiona

My Hero Academia has Ippan Josei which had a furry-esque design.

Carmelita fox.

The Palworld craze has died down a little, but why not try a design from there? People still like Lovander.

What are popular? I dunno, but I would love to see you draw Sergeant O'Fera (AKA Captain Bluebelle, Chinook Captain Saluki, AKA Chinook Pilot Saluki) from Cuphead DLC (https://cuphead.fandom.com/wiki/The_Howling_Aces)

Nice to know I'm not the only one who's tired of Loona, she's really overrated!

You just did Porsha so how about Diane Foxington? Colleen from Road Rovers is another forgotten sweetheart I miss seeing.

Maybe Ceroba Ketsukane from Undertale Yellow?

https://civitai.com/models/249463

--Carmelita Fox (Sly Cooper ) is always nice to look at.
--Elora (Spyro), I'm a big fan of and is a personal favorite.
*More to follow

i think lopunny and the cult of the lamb protagonist are always popular, tho wish you woud try to revitalize a forgotten popular by placing her alongside a popular character instead

Is hard to say, what's popular now might not be tomorrow, if I bet it would be

* Helldivers : Eagle-1 pilot / Helldiver
* Cult of the Lamb: Lambert (The Lamb) or Narinder (The One Who Waits), or any other Bishop
* Palworld: Depresso, Chillet or Loveander

You could always try for the past
* Any GTA Protagonist
* Doomguy or Demonslayer (You can't never be worng with DOOM)
* Anything Pokemon related
* Cortana or Master Chief form Halo
* Any platformer protagonist (Mario, Spyro, Crash, Rayman...)

Or could try something diferent like
* From Glitch : Chracters from Murder Drones or The Amazing Digital Circus