Bare metal servers offered at Scaleway are at reasonable prices, which can be compared to those on Hetzner. You even get Proxmox installation by default contrary to Hetzner were you need to install Debian first. To setup Proxmox with one public IP anf pfSense with another one you need to order Flexible IP and request for virtual MAC address. Remember that on Scaleway’s flexible IPs gateway is fixed and it is 62.210.0.1. Then for the network configuration: x.x.x.x is primary Proxmox public IP. y.y.y.y is its gateway (with a.a.a.a network with b.b.b.b netmask). z.z.z.z is then your secondary public IP
There is not too much a precise documentation from Hetzner available if you want to know what exactly you should do to run dedicated servers with primary and secondary public IP, virtual machines and vSwitch. There are some articles but they are written in non-informative way. However their support is on very high level so far, they respond quickly. Debian & Proxmox Installation So, to go with Proxmox on Hetzner you will need to know that there is supported installation. You restart your server into rescue system (remember to power cycle your server) and then there is Proxmox to choose