A few things for you to consider:
1st off, you could choose just about any rack and mounting style you like ... IF... you first buy the LLAMS electronic height controller. This allows instant -2omm below factory "access" height on all 4 corners. Then, additionally using the red "emergency/extra button, it lowers mainly just the rear by roughly another 20-25mm.
2md, The sharkfin is more or less a useless measurment (no offense) because nothing is mounted to it and it's difficult to estimate what impact any roof items will have on height clearance without knowing the clearance at each factory track.
3rd, what do you need a rack for and do you "need" or just want it ?
Some people realize the rack itself is 99% unnecessary when they can simply mount a RTT or even other items directly to solid cross bars such as Thule or Yakima.
For example, if you want a standing platform, why make it an otherwise useless rack when it could be highly useful bridging ladders or RTT or rigid storage case? For that matter, the bridging ladders don't even require cross bars because they can mount directly onto the factory front-to-rear side rails.
Just some ideas to get you outside the norm of blowing $$$ on a rack that is often very underutilized.
I am willing to bet that a custom flush mounted clamshell style RTT may even clear your garage when using the LLAMS kit to lower maximally. This also depends a lot on your tire size now vs later. Or you could even do what the truckers did in the 70's movie "Convoy" and let enough air out of the tires to roll in
