Garthanos
Arcadian Knight
My favorites seem to be spear wielders check out Balsa from Moribito about half way through this excerpt she is fighting other elite fighters with a broken spear head and is still refusing to take a life over a life debt she has...Well, you need a good Wis and Dex to multiclass monk anyhow. But emphasizing fighter gives you better weapon choice; more attacks with your action, and depending on what your subclass is, various other cool options and flavorful things such as superiority dice or improved crit range, etc.