How to display all product prices on the page at once with Drupal commerce?
If themeing is considered "involving code", then you could create a view block.

Using Contextual Filters and Relationships, a View will be able to list all the referenced products on a node (including their fields).


Start by creating a View listing all the nodes that have a product
reference field (ex: Product Display).
Add a Contextual Filter for the Nid that defaults to use the Nid from the URL
Next add a Relationship (Product) using the product reference field of the Product Display node
Then add another Relationship (Line Item) for the Commerce Line Item of the referenced product


After that is all setup, you can add fields that use the Line Item relationship to get product titles, calculated prices, etc.