Best code editor for crafting to make development app

I wish to create web application that allows developer to code online. (An online IDE) Researching online I came across these-

• Ace editor: simple, AWS uses it
• Code Mirror: simple, popular
• Xray[Atom]: Not fully developed, can't get past a bug- The socket can't send frames larger than a specific size. Need to develop a rust codec, but have no experience doing that.
• MS Monaco editor: Excellent, but I need to develop the app in node and the editor is not written very well to support module api, rather relies on physical location to find files in node modules.

The most important aspect of all is I will need to put effort to develop file system browser, package manager, and rest of the panels myself. I can build those, but, is there a tool or open-source project that would best suit my application?

And how would you compare with the one's i mentioned above.