I have made more than 20 yagi antennas for 2 meters and 1 for 6 meters and found that the gamma match was the easiest to tune and construct. I still have 8 aluminum and stainless gamma matchs left over from classes antenna construction class I had about 15 yrs ago. The grounded metal elements were the simplest to make.
I used u channel aluminium stock and 1" square fiberglass stock for 3 of them.
Richard Heston (KE4BQI)