If your requirement is a GUI, you're not going to find anything. HA Proxy is also the most performant out of anything out there last I looked, and it's got one of the simplest configuration setups.

• Traefik: kinda slow, mostly meant for large numbers of microservices, pretty verbose configuration
• Envoy: middle of the road, also most meant for cloud services, but should work with anything
• nginx: does have a popular 3rd party GUI, seems to be confusing for most that don't work with it a lot
• caddy: fewer LB specific options if you're just talking about service routing and response time, pretty easy to confirm for most, and some sort of decent 3rd party UIs, but they won't have all the options available.

Pretty much all of them.

I didn't know haproxy had a GUI, but the config files are very simple. I would just modify an example one and call it good.

Maybe nginx proxy manager can do this.

https://nginxproxymanager.com/

If you’re ok with closed source and 20mbps, kemp makes a free version:

https://freeloadbalancer.com/home