WAN-L.O.V.E. is hybrid Wan Low Overhead VRAM Efficiency Image-to-Video Fast (4-step) All-In-One model (full checkpoint: UNET, CLIP and VAE). All you need to encode source images is this model and . Use CFG 1 and Euler sampler and beta scheduler and model shift 8-12. Enjoy!
In ComfyUI just use usual default workflow with checkpoint loader, CLIP vision loader and sampler.
Note: If you look for Wan 2.2 all-in-one version, then checkpoint, the same 1-pass workflow as for Wan 2.1 will work well.