My home server runs everything on a single install of Debian... four websites, a dozen subdomains, HTTP, mysql, plex, a backup system I wrote myself (nothing fancy, just timed backups of various directories to an external drive), smb, ftp, transmission web daemon, ssh, a minecraft server, pydio, etc. (various small daemons for resource usage, like this
Been running for a solid 128 days now!
AMD A-10 5800K (sort of regret it, but eh, it does more than okay for a server)
8GB DDR3 1600 RAM
64GB SSD for the OS, websites, MC server, etc + 4TB HDD + 3TB external
A Mini-ITX motherboard and this case: