Flux Kontext is probably the best for local for a few reasons, but it's slow, uses a lot of VRAM, and changes the quality and resolution. Amazing results if you want <2MP final images, though.

If you need a detailed mask for editing in another application, florence2 or SAM. Or rembg for decent all purpose one shot removals, as long as you have a touchup process or don't mind rerunning the failures.

Stable Diffusion (Web UI or whatever) has add-ons (e.g. rembg) that are really good at this last time I checked