Single tank plts are ok. It's the 2 tank platoons that suck. You still get to remount first if you are bailed, and a tiger should be a 2+ remount so not a big deal. Lots of 1 Tiger platoons is probably the best for Tigers now. Also increases the chance for overkill shooting.
With the first list maybe try to make it a 90th PzDiv PzGren, and a 26th Pz Panzer company as otherwise losing both the small infantry platoons will break you.