WAN Failover and VRRP/VPN

I'm interested in how you would build a WAN with fail over both at the hardware and networking level between two sites. I have some basic networking knowledge but would like others opinions. How would you go about implementing a solution of using two edge routers for redundancy?

• 2x EDGE routers using VRRP where one router is the master and the other is passive.

• Is it also possible to provide redundancy in this scenario using an additional ISP to connect to the edge routers so we can switch over if one of the link fails? if so, how would this be implemented and how would we ensure VPN connections are reconnected if one of the links fail? I'm thinking of something like edge routers with DUAL WAN ports.

• Is there any way OSPF could play into this scenario and how would it be implemented?