When the landscape is attractive, incorporating it into your wildilfe photography is a great idea.
The Canon EF 100-400mm f/4.5-5.6L IS II USM Lens
is my go-to lens for this scenario.
The focal length range keeps both the animal and the background large in the frame and provides plenty of framing flexibility.
A partly cloudy day sometimes provides ideal lighting.
This image was captured just before the shadow of a cloud reached the bull elk, leaving the surrounding background dark, helping the bull and its antlers stand out.
A larger version of this image is available on Flickr