Death Valley is something you only want to do when the weather is cool. Between now and November, I'd drive around it. I was there once in August, without air conditioning. That's a very memorable thing to do, but you'll do that only once.

Mousie's trophy shot:
Telescope Peak should be snow free by now, but it takes a full day round trip from the trailhead
Rogers Peak is easier to reach (gravel road) and if your vehickle has some ground clearance, you can get to 8100 feet by car at Mahogany flats (summit is 9990)
the view from there is that
big panorama I posted recently, plus you have the view down to the valley, too, which is very close to what you'd get from Telescope Peak a few miles further down the trail. This is from the ridge north of Rogers Peak:
View in the valley, coming from Vegas into the south end of the Park via Shoshone:
and just a little closer to Badwater: