If you're looking for more advanced masking abilities, Pixelmator Pro is a powerful image editor that could be just what you need. It's got a completely redesigned masking system with AI-generated background masks, vector masks and on-canvas controls. It also has advanced color editing tools, retouching tools and the ability to edit RAW photos from more than 600 digital cameras.
Another option is the Segment Anything Model (SAM), a computer vision model that can perform zero-shot object segmentation with a single click. It uses a single image encoder and a lightweight mask decoder to generate masks that can be used for tasks like object tracking, image editing and 3D object generation.