I don't think you should consider Black Label plugins (it is not a library), as third-party ones.
Black Label is a company that has an official partnership with Highcharts, where you can find dedicated support and development teams for various Highcharts features, such as creating custom plugins for the Highcharts library itself.
Meet the BlackLabel team on the official Highcharts website:
https://www.highcharts.com/blog/people/
Read more about the partnership here:
https://blacklabel.pl/highcharts/
Nevertheless, if you still insist on not using the official Highcharts plugin, then I'd suggest using the xAxis.categories for W1, W2, W3, etc., and then render the rest with the Highcharts SVG Renderer, just like I showed you before.
Let me know your thoughts about it,
Best regards!