I now only use one pattern for shirts I wear, I vary collars, add front yokes, etc.
The pattern I use is a 1979 Simplicity pattern 8711.
If I want a different coloured or bias placket I can use the separate style.
The original collar was high with long peaks, 1970s style but I prefer a lower collar, the original height is on the right, I lowered it by 1 cm as seen on the left. It’s much more comfortable.