If you want an AI-powered tool to match musical elements to your song arrangement, Jamahook is a great option. It analyzes tracks in real-time and supplies harmonically and rhythmically compatible elements from local libraries or a cloud of high-quality loops. It can perform pitch-shifted matching, harmonic and melodic matching, and rhythmic and drum matching, all within your DAW. That can save you a lot of time in your production process and help you come up with new ideas.
Another interesting option is Cryo Mix, a collection of AI tools for mixing and mastering. Although it's geared more toward improving the overall sound of your audio, it's got tools like AI Mixing to create a polished mix, pitch correction, and an AI Audio Separator to tease out individual stems from a single file. That can be useful if you want to finesse your tracks and get a professional-sounding result.
If you're interested in drum loops specifically, Drumloop AI is an interactive beat sequencer that lets you create and customize drum patterns. It's geared for pros and beginners, with royalty-free drum loops that you can easily drop into your DAW to add some new energy and depth to your music.