Static file serving? Sure!
Load balanced proxying? mod_proxy_balancer is great!
Fine grained caching? mod_disk_cache is also great
Updating loadbalancer bits via the api?
mod_proxy_balancer supports a balancer-manager endpoint for that to do live updates
monitoring? mod_status + prometheus exporter or
mod_prometheus_status
native LE support? https://github.com/icing/mod_md is going to be rolled into upstream apache