Wired ethernet is 'easy', be it Realtek or Intel (other also tend to work, but those two are the most common options) - preferably PCIe based, but Realtek rtl8152/ rtl8153 also produces a decent USB ethernet card.
Wireless is better outsourced to dedicated APs, yes internal PCIe cards from Mediatek or QCA exist, but they (and pigtails && antennas) end up more expensive than decent APs - plus all the trouble with a single PCIe slot in most small computers (futro in particular) and proper antenna placement.
Also have a look at:
(in particular the later examples in that thread, avoiding AMD jaguar cores)