When deploying an lpkg file from Marketplace, it will deploy the jar files in the alphanumeric order that they're packaged. We ensure that all apps can deploy as lpkg files 'out of the box', so we're averse to extracting jars from the lpkg and deploying on a jar-by-jar basis.
Fortunately, there is a way to set bundle deployment order so that it will block the start up of one bundle until the referenced class is available - we use it a lot to make bundles wait for other bundles. Using this Reference notation should help resolve your inter-bundle dependencies
https://docs.osgi.org/javadoc/osgi.cmpn/7.0.0/org/osgi/service/component/annotations/Reference.html