have you tried dynamically loading those jars, rather than dumping them in /lib etc?
i.e. providing a context? https://docs.lucee.org/reference/functions/createobject.html#argument-context
createObject(“java”,“com.yeokhengmeng.docstopdfconverter.DocxToPDFConverter”, [‘all’, ‘the’, ‘jars’, ‘it needs’]);