Theme suggestion for text-heavy website similar to Inbox theme [closed]

I am looking for a theme with a similar structure as the one here:

I unfortunately can’t use that one because it’s horribly coded and basically any modification causes it to malfunction.

I’ve been looking for something similar, with two sidebars, one to filter, one to display a feed of all posts, and a preview pane that contains data of the post that is selected on the second sidebar.

If anyone has any ideas regarding something similar, would very much appreciate it.