Inspired by DreamShaper 7, I've tried to find a merge that can make a bit of everything and do it well (given a decent but not extensive prompt), and I think I've done it.

For realism - add "RAW photo, photorealism, photorealistic, Fuji XT3" to the positive prompt and "((anime, cartoon, 3d, cgi, ((render)), cg, unreal engine, octane, digital art, line art, watercolour, sketch, illustration, painting)) " to the negative prompt. Use a DPM sampler (e.g. DPM++ SDE Karras) at a low cfg scale (3-5), and Clip Skip = 1.

For 3d render/cgi - add "3d, cgi, ((render)), cg, unreal engine, octane" to the positive prompt and "((3d, cartoon, anime, sketches, render, cgi, unreal engine, octane))" to the negative prompt. Use an ancestral sampler (DPM++ 2s a Karras, Euler A), a mid-range cfg (6-8), and Clip Skip = 2.

For anime - add "((anime))" to the positive prompt, and "((RAW photo, photorealistic, realism, depth of field, Fuji XT3, 3d, cgi, render, cg, unreal engine, octane))" to the negative prompt. Use a DPM sampler, a medium to high CFG (7-10), and Clip Skip = 2.