I have a battered Lowepro knockoff I've had forever, it is a great blad bag. Paid 20 bucks for it twenty years ago. And the Domke F2 is another good blad choice, I have four of them for blads, leicas, whatever.
For carrying absolutely everything I have a massive Billingham bag with large accessory pouches. It's so heavy I can't carry it far, but it deploys everything well from the ground and works keeping it all well organized.
For incognito carrying I like the Domke Messenger bag, it carrys the 350mm f5.6 Tele Tessar and the 40mm Distagon, I hand carry a body, and it works well. I can take it anywhere.