Assuming you can make a chain with any top plate angle you choose, and durability is a non issue, what do you like?
Should note that I cut way more oak than pine or other soft species.
I buck almost exclusively turkey oak, which is much more dense than "regular" oak (You figure out the difference between the two!).
I have always been round filing and I tried full chisel, semi chisel, round tooth and semi chisel solid carbide tipped.
I use .325", 3/8"LP, 3/8" and .404" pitch chains.
I tried Oregon/Dolmar, Carlton, Stihl, TriLink, Archer.
I have been filing free handed, with bar mounted filing aids and with Archer FastFiler roller guides (which ride on top of a bar mounted chain).
The fastest cutting chain is 3/8" Oregon LGX 3/4th to half worn, round filed with an Archer FastFiler sporting custom made side and bottom rollers.
A completely stock FastFiler is just as fast or a little bit faster but generates a cutter that dulls quickly in oak/turkey oak.
A new sharp file is the best way to get a very sharp cutter edge.
My chains always self feed, when they don't I consider them dull!
I filed a TriLink loop yesterday, gonna go and take some pictures.
Stay tuned