Who is the best BBL surgeon in Los Angeles for achieving this voluptuous look I want? (Photos)

All patients can have an improved shape and better waist-to-hip ratio from a BBL procedure, however, you can not necessarily look like someone else. There are limits to what fat can do and this will be discussed with you during your consultations. I recommend choosing a few (maybe three) different plastic surgeons and deciding who is best for you after consulting with them.
Best wishes,
Dr.Bruno

Far more important than the technique is the skill and experience of your plastic surgeon. Choose your surgeon rather than the technique and let them explain why one technique may be better than another.  See the below link on some suggestions on finding the most qualified Plastic Surgeon for you.  Always insist on a board certified plastic surgeon.

It is best to be seen in person to properly evaluate, with that said based on the photos alone, you appear to be a good candidate for a Brazilian Butt Lift. Liposuction of your abdomen, flanks, and back will give you a narrower waist and and a BBL will give more curves. I recommend consulting with a board certified plastic surgeon who specializes in fat grafting to the buttocks and be sure to look at their before and after pictures to get a better idea of their results. Kamran Azad, MDCertified, American Board of Plastic Surgery

Choose a board certified plastic surgeon who is highly experience in Brazilian Butt Lifts. 
When you're looking for a cosmetic procedure you find a surgeon that has been certified by the American Board of Plastic Surgery

Dear Scarletteugene,based on your photos, you look like a good candidate for a BBL. Liposuction of your abdomen, back and flanks should give you more curves and hourglass shape and fat transfer to buttocks should give you more projection. I would suggest you to consult a board-certified plastic surgeon because only after a thorough examination you will get more information and recommendations.Finding the right Dr. is extremely challenging especially with the number of online platforms and resources available. There a lot of great Dr's available. Definitely check to make sure your choice specializes in the procedure you want and spend the time to read through patient testimonials. 

You can always pick up the phone and call around also, find an office you feel comfortable with and set up a few consultations. 
Daniel Barrett, MD, MHA, MS 
Certified, American Board of Plastic Surgery  
Member, Am. Society of Plastic Surgery

Seek a plastic surgeon who performs many of these procedures, has great reviews and photos, and is an expert in this field.

Doing BBLs is a very particular part of a surgeon's job and you should see a Board-Certified Plastic Surgeon who has experience with BBLs and fat grafting. I would recommend that you get HD VASER lipo of your abdomen and flanks and then get the fat grafted to your buttocks. The only way the get the result you want is with VASER lipo. 
Many surgeons, including as myself, offer skype, facetime, and phone consultations so you can speak to several doctors before making your final choice.