Stable Diffusion by far! I recommend using it over most/any AIs if you have the hardware. Check out Automatic1111 for Stable Diffusion 1.5. Hugely customizable.
I like to use Bark Infinity to have a audio playback of my work. It helps me catch Grammer errors that Grammarly missed.
Elevenlabs is way better but I'm not making enough yet. So it's Bark for me until then.