Odd, the default according to the docs is now flannel. Note that that is the default choice _if you ask for network in your configuration_, otherwise it doesn't do any (this caught me out).

Rook is doing OK for me so far, but be warned, the api is seemingly quite volatile at the moment

For ingress on bare metal (I assume that is what you are using), either nginx-ingress (for rest protocols) or metallb for arbitrary ones.