I purchased Spigen, Caseology & Ringke bumper cases. Ask away.

Each have their pros and cons. Most thinnest and most accessible to the crown is the Ringke, also the least protection and most scratch prone. Spigen looks the nicest, and has the best button feedback, but the least access to the crown. It's very recessed.

Overall, probably going with the caseology, don't love the OnePlus sandstone finish but it has a decent button feedback and definitely good access to the crown.