There's always too much to see !
Two stops will work well along the coast and should make a relaxed enough journey. A lot of people just have the one.
The same goes for San Fran, you could easily spend a week there exploring, but you could get a good overview with 2.5 days which would give you the opportunity to head for Yosemite on the 23rd. It's all about making the time you have to work for you and your tastes.
It's not possible to get a clear picture from your map as it's so small, but you won't be able to get from Yosemite to Death Valley and visit Sequoia NP same day. There is a big distance between the two as you have to go around the mountains that stand between them. I would visit Mariposa Grove of giant trees in Yosemite and travel over the Tioga Pass to Mono Lake and down 395 towards Death valley.
The waterfalls will most likely be all but dry when you visit, but fear not, you will not be dissapointed with what you find. Be sure to drive up to Glacier Point !
From Death valley I would head to Springdale UT to visit Zion NP and then head for the North rim, Bryce canyon or both ! I would recommend both, but use an extra day [or half] which you could save along the coast, or from any of the City stops.