S-189 makes outstanding lagers, but does have lower attenuation than other yeasts (i.e., comes out a little sweet). Fortunately this can be assisted by a longer mash time (90-120 minutes or even overnight) at low temperature around 148 F.
I haven’t used W-34/70 in a while as I did not find it quite as impressive. But a lot of folks love it.
I have also heard great things about Diamond from Lallemand and eventually will try it.
For now, S-189 is hands-down my favorite, very authentic lagers.