Centralized Logs?

Hello dear Senpais,
I'm a little at a loss at the moment and looking for some insight. I was tasked with finding and demoing a log collection software to keep track of our different scriptslogs etc.
The prequisites are:

• Needs to collect windows event logs, linux syslogs and custom logfiles from different streams
• Sort them by criteria (like date) and display them if needed

Of course I found obvious solutions like Greylog or Logstash, but they seem a little overkill as we do not need any alerting, fancy graphs or the likes. We could simply write a script and a little framework to do our needs but I don't want to have another quick and dirty solution (we have far too many of that already...).

tldr;
I need selfhosted software that keeps logs and can display them from multiple sources like rsyslog, event log and custom files. Any suggestions?