Answered a different variation of this question in another thread, and it's hard to answer because different people look for different things. The girl that I most yearn to see right now is one that basically looks like my high school GF, but you won't feel the same nostalgia if you see her, so it won't be the same.
Melody Rose is Indy and session start at lower rate than Zayla; certainly can't go wrong with either. But understand that Zayla only offer PSE session, Melody Rose is GFE, so apples to oranges rate comparison. Melody Rose is probably one of most attractive SP's to have ever worked Victoria, but she blends more, and I've met girls in my day to day life that look similar to her. Zayla looks like she came out of a Japanese Manga, or music video. No one in my life has had a similar look.
I my opinion the current most attractive girls at agencies are Darla at SVIP and Ava at SU. Crimson at IF also has one of the most attractive faces, but her body is not as nice. But Darla, Ava and Crimson both have shaved or partially shaved heads, which acts to just focus even more in their gorgeous faces, but won't be everyones cup of tea. Think Natalie Dormer in Mockingjay.
But when it comes to pure sexual energy and skill, Ellie at SVIP, Lila at SVIP, Mabel at IF and Zayla are tops. When it comes to connecting with client and really making you feel wanted, I think Olvia at SVIP is tops.
So best girlfiend is Olivia, best porn star is Zayla, best friend with benefits is Mable, and best one to take a Kama Sutra master's class with is Lila.