Ran across a cameo of this guy in Scooby Doo: Mystery Incorporated and had to grab the 1080p quality. :)
Trained on: waillustrious v16.0
Trained him to 2000steps to make dang sure he's the hairy one in pics, lol. With such a high step count you should have character retention down to 0.6 allowing multi characters without to much bleed through. I'll often render the scene with him at 0.6 then inpaint him at 0.8 for better accuracy. This step count also allows good merging with different styles.
Basic Info:
Strength between 0.6-0.8 (1.0 will just copy the dataset)
If a lady is in the pic, she will steal the capelete.. no way around this, as 99.99% of checkpoint data has women in capletes. I just render without it then paint a little yellow on his back, then inpaint that.
His nose is trained in as part of the body but if you get a small nose, add "bog nose" trigger.
If you want his iconic shout pose, "Spiked Hair, Shouting" works 50/50 depending on ckpt/lora's.
Trigger Words:
caveman, 1boy, short male, fewer digits, large nose, hairy, body hair, barefoot, capelete, holding club || spike hair, shouting || midair, floating, flying