Me fucking around in chat gpt until I had something good to repeat to myself in times like this. It turns out it's actually pretty good at common meter rhyme, the trick is to ask for 5 iambic pentameter couplets at a time, then split them at the eighth syllable into those 4 8686 syllable lines. I also usually specify "casual language" and "natural word order." You ask for five or so options for each verse so you have some ideas for words to swap around until something sounds good. I've been thinking I need to write a proper ballad about some characters at some point but I haven't got round to it.