my topic is similarity and clustering of (a bunch of) text(s). In a nutshell: I want to cluster collected texts together and they should appear in meaningful clusters at the end
Just try some. There are so many clustering algorithms out there, nobody will know all of them. Plus, it also depends a lot on your data set and the clustering structure that is there.
In the end, there also may be just this one monster cluster with respect to cosine distance and BofW features.