I recommend the GGUF version for best results.

UmeAiRT controlnet v3 simple workflow

I share my controlnet workflow.

The easiest way to install all the files needed for workflow use is to use one of my installation scripts or my manager.
In general, you're missing the “RV-Tools” node, which is not detected by ComfyUI manager. You can find it in “Custom node manager”.

To install the missing nodes, I created a script : ComfyUI missing nodes auto installer - v2.0 | Flux Other | Civitai

I've written a complete guide to its use : Step-by-Step Guide Series: ComfyUI - ControlNet | Civitai

Resources you need:

Flux.1

Depth

boricuapab/flux1-depth-dev-fp8 · Hugging Face
"flux1-depth-dev-fp8" in ComfyUI\models\unet

Canny

boricuapab/flux1-canny-dev-fp8 · Hugging Face
"flux1-canny-dev-fp8" in ComfyUI\models\unet

black-forest-labs/FLUX.1-dev at main (huggingface.co)
"ae" in \ComfyUI\models\vae

comfyanonymous/flux_text_encoders at main (huggingface.co)
"t5xxl_fp8_e4m3fn" in \ComfyUI\models\clip
"clip_l" in \ComfyUI\models\clip

For GGUF

I recommend :
24 gb Vram: Q8_0 + T5_Q8 or FP8
16 gb Vram: Q5_K_S + T5_Q5_K_M or T5_Q3_K_L
<12 gb Vram: Q4_K_S + T5_Q3_K_L

GGUF_Depth

SporkySporkness/FLUX.1-Depth-dev-GGUF · Hugging Face
"flux1-depth-dev-fp16-Q8_0-GGUF" in ComfyUI\models\unet

GGUF_Canny

SporkySporkness/FLUX.1-Canny-dev-GGUF · Hugging Face
"flux1-canny-dev-fp16-Q8_0-GGUF" in ComfyUI\models\unet

GGUF_clip
city96/t5-v1_1-xxl-encoder-gguf at main (huggingface.co)
"t5-v1_1-xxl-encoder-Q8_0.gguf" in \ComfyUI\models\clip

Better flux text encoder
ViT-L-14-TEXT-detail-improved-hiT-GmP-TE-only-HF.safetensors · zer0int/CLIP-GmP-ViT-L-14 at main (huggingface.co)
"ViT-L-14-GmP-ft-TE-only-HF-format.safetensors" in \ComfyUI\models\clip

Upscaler

ESRGAN/4x_NMKD-Siax_200k.pth · uwg/upscaler at main (huggingface.co)
"4x_NMKD-Siax_200k.pth" in \ComfyUI\models\upscale_models

Controlnet (for v5 and earlier)

Canny: flux-canny-controlnet-v3.safetensors

https://huggingface.co/XLabs-AI/flux-controlnet-canny-v3/blob/main/flux-canny-controlnet-v3.safetensors

Depth: flux-depth-controlnet-v3.safetensors

https://huggingface.co/XLabs-AI/flux-controlnet-depth-v3/blob/main/flux-depth-controlnet-v3.safetensors

Hed: flux-hed-controlnet-v3.safetensors

https://huggingface.co/XLabs-AI/flux-controlnet-hed-v3/blob/main/flux-hed-controlnet-v3.safetensors

in \ComfyUI\models\xlabs\controlnets