The OOB page is hard to read, e.g. the file name and type is prominent and other hits are bold in the small print.
What is the best way to control a search return page? e.g. use configurable web parts? use the basic enterprise search center?
You can use alternate CSS to adjust the style as you wish.
If you want to change how it is displayed, you would create Search Display Templates for the Search Results (JavaScript,CSS,HTML knowledge required).