Hmm...you're missing a couple of other Berlin schoolers...
First up has got to be Manuel Gottsching, who began with the VERY trippy band Ash Ra Tempel and then went on to create a major part of the early template for techno (ie: "E2-E4"). Hands down, 100% recommended.
Then there's the SPIKY Berliner, Conrad Schnitzler. He was more aligned with the grittier, proto-industrial side of things, which shouldn't be a surprise as he was on the first TD album, and the first few Kluster albums ("K Cluster", basically...they changed the first letter to the more anglicized "C" after Schnitzler left). But for a serious dive into his work, grab the several "Funktion" albums, all of which are titled by different colors ("Funktion Gelb", "Funktion Blau", etc).
And the last I would recommend in that style has got to be Popol Vuh's first two albums, "Affenstunde" and "In den Garten Pharos". After those landmark electronic-based albums, Florian Fricke gradually shifted to acoustic instruments but continued to make brilliant music along the same lines as previously...just minus the electronics. Fricke technically isn't Berlin school, as Popol Vuh was based out of Munich (along with the Amon Duul groups, which Fricke drew on for later Popol Vuh lineups).
There's more...a dive into Bureau B's catalog is a great way to tackle the various different Krautrock flavors: http://www.bureau-b.com/