Not only can you use Cubase 8's Groove Agent SE as a sample-based drum machine (where you trigger individual drum hits), but also as a drum pattern player. Yes, Groove Agent has sequences built-in. So, even if you don't know much about programming your own drum patterns, or just want something to quickly jam to, Groove Agent SE has you covered.
This video on Groove Agent SE is taken from Matt's course: Cubase 8 102: Songwriters & Musicians Toolbox at AskVideo. Check it out!