Displaying two Content Types in a single view
In response to Molot:

There are several ways to skin this cat. I believe that the approach I took is the easiest, though there is one remaining issue (more below).

Steps:


Add the References module (other options include using the Entity Reference module and one other similar module)
On Admin->Modules, under Fields, enable References and Node Reference, and click Save Configuration.
For the 'parent' entity type (in my example above, Panel) add a new field of type Node Reference. In the settings for this field, select the content type(s) that can be referenced (for my example above, I chose Presenter). 
In the patent entity type, chose Manage Display. For the Referenced Node, you can choose 'Rendered Node' as the Format of the child node (and you can define this to be the default view, the Teaser view, etc.)
For each entity of the parent type, in the newly created reference field, start typing the title of the field to be referenced, then click the proper one.


As noted above, I am still having one problem - see Configuring View output with multiple related nodes for details.

I hope you find this helpful.