Overall all CSU’s have good programs but does depend upon what you want to study since not all CSU’s will have strong programs in all majors.
Rankings do not show the whole picture, the rankings can be variable and Undergrad programs are not ranked, only Graduate programs.
Overall top/competitive CSU’s are the following (my rankings) based on GPA/test scores and impaction:
Cal Poly SLO
San Diego State
Cal State Long Beach
Cal State Fullerton
San Jose State
Cal Poly Pomona
Cal State Fresno
Non-impacted CSU’s but not necessarily lower ranked:
Cal State Stanislaus
Cal State Dominguez Hills
Cal State Channel Islands
San Francisco State
Cal State Bakersfield
Humboldt State
Cal State Northridge may not be a top ranked CSU but they have a highly respected Accounting program while East Bay’s CS program is also highly respected.
The link below shows average CSU and test scores for the 2018 In-coming Freshman class based on stats, so you can determine the “top” Cal states.