Somewhere slightly off the beaten track but well worth a look is The Windermere.
Next to South Kenton Station, which is two stations north of Wembley Central, they've got a big marquee in the garden, plenty of space indoors, and don't increase their prices on matchdays like a lot of the pubs nearer the stadium.
https://maps.app.goo.gl/rt1WUFKCtxtQcwpeA
Tubes take about four mins from there to Central and run every ten minutes. Lioness Line covers the same stretch too.