JMeter - How do you group all requests related to a page to provide cleaner results?

For this you can use Transaction Controller:

• https://jmeter.apache.org/usermanual/component_reference.html#Transaction_Controller

Keep Include duration of timer and pre-post processors in generated sample unchecked.

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I agree with PMD, Transaction controller is exactly what you need.
You can achieve that automatically (while you're saving your test) if you enable jMeter proxy's option Put each group in a new transaction controller.

A couple of more details (about jMeter Plugins' listeners I regularly use) here:
Define a group of requests in order to obtain a total time in Jmeter