
How complicated do you want to go? The Modify ePub plugin is a good example of a lot of things, but, the options prompt is dynamically built from a list of options.
For examples, I'm tempted to say, "All of them". Most plugins use a checkbox either in configuration or when started. But, there are a few that don't.
I have some much simple dialogs in my Kobo Utilities plugin. Unfortunately, to see them, you need a Kobo device plugged in. If you look at it, the "Clean Image Directory" is the simplest with a simplest with a single checkbox as an options. The "Kobo eReader Font Settings" has a mix of checkboxes, dropdowns, spinbuttons and entry fields.
And,




, I just found a problem with the Python 3 changes. I thought I had them all.