What I ended up doing was (really) quite simple. It ended up being more of understanding syntax more than anything else.
For my ListView I ended up having my definition implemented with specific brushes:
<ListView ItemTemplate="{StaticResource ResourceKey=DisplayInfo}" ItemsSource="{Binding Path=EventList}" Height="568" HorizontalAlignment="Left" VerticalAlignment="Top" Width="201" Margin="1,4,0,0">
<ListView.BorderBrush>
<SolidColorBrush />
</ListView.BorderBrush>
<ListView.Background>
<SolidColorBrush Color="#99FFFFFF" Opacity=".8"/>
</ListView.Background>
</ListView>
And as specified in an article I read, doing it with a brush assignment gives me the most performant implementation. It still comes out a touch lighter than the backing container, however it is opaque and looks natural. So just a little tweaking should get me where I need to be for the final product. :) It should also be noted for other readers that the Grid stays out of the way as far as the visual stack goes. So setting the listbox opaque gives me what I need without having the screw with any view settings on the Grid.