Which script do you use? You can use the Attributes and Abilities tab - put basic ratings like attributes and skills on the Attributes side, and commonly used rolls on the Abilities side. Back in the early days of roll20, we didnt have character sheets and that's what we had to use. It's not pretty, but gets the job done. And with scripting, you can set up chat menus to display simple character sheets, and have buttons to roll the stats, etc.