I have used a variety of L-Brackets on Nikon, Fuji, Canon and Hasselblad and while they have "done their job" they all suffered various annoyances and quality issues and the 'L' side becoming loose being the main problem. So much so I could not trust them and had to remove them.
So I am very pleased to recount that the ProMediaGear L brackets PLCR56 for my R5 and PLX3T universal for my X1Dii are very robust and accommodating for access to ports and easy full use of the articulating screen. For portrait orientation the brackets are very sturdy and rigid enough that vibration at this point is a non issue. Also they don't come loose!
An unexpected bonus is the convenience of being able to use the left side of the bracket as an additional hand grip. It even feels nice and smooth like it was made for that. Just love it!!!