Hey JFab, hey all,
if you first want to remove lots of material, I would use a roughing bit. It is made for an increased MRR and better chip evacuation.
If your pocket then has rounded transitions to the bottom on the inside, I would use a ball nose bit. By the way, you can also finish hard wood with a ball nose (e.g. 8 mm), at least if you plan a lot of time for it for very thin passes. It may in some cases possible to avoid sanding with that.
Unfortunately I only know sources in my region but I’m sure there are similar in your region
Roughing end mill
Sorotec.de Shop » Cutting Tools » Sorotec tools » 2-Flute Mills » Roughing mill for wood » Roughing Mill Z2 Ø 8 mm Wood
→ Here you can see this roughing cutter at work (video)
Ball nose cutter
Sorotec Shop » Cutting Tools » Sorotec tools » Radius Mill » 2-Flute UNI » Radius Mill Z2 Ø 8 mm UNI