Midjourney is the strongest fit for designing banners and promotional graphics, producing high-quality, visually polished images that work well for social media campaigns on Facebook and Twitter. You can prompt it with your brand colors, dimensions, and campaign themes to generate eye-catching visuals quickly, then refine them through its iterative upscaling and variation system. Ideogram is a solid alternative when your banners need accurate text rendered directly in the image, which is a known weakness of many generators. DALL-E is worth considering if you are already using ChatGPT Plus and want a tightly integrated workflow without an extra subscription. Stable Diffusion suits those who want a free, self-hosted option with full control over fine-tuning and output dimensions.