Here are couple of additional ideas, in no particular order:
1) Drive up Mt. Hamilton for views from Lick Observatory. It's a good 2hr drive each way, though, if I recall correctly. Narrow winding road, not for the faint of heart.
2) Drive up Page Mill Rd in Palo Alto or Alum Rock Ave in San Jose in the evening for night shots of the South Bay area as a "it's full of stars" scene (no, I'm not talking about Google millionaires
3) Hakone Gardens in Saratoga. Not exactly landscape, per se, but if you're into Japanese gardens...
4) Stanford University quad is always a nice sight, especially around sunset.
5) If you don't mind hiking a little, Almaden Quicksilver County Park offers some nice views over the South Bay (daytime only).