2) Hückebein Mk III Gunner
3) Alteisen Riese
As for Wildwürger, I did quite a lot of research and I still haven't seen "Würger" meaning "Shrike" in any German dictionary so far. Nevertheless, I go with that spelling anyway, as it's the official one and makes sense. (there are some official spellings that don't make sense, such as "Hagwane," "Hiryu Kwai", and the like). The meaning "Shrike" also goes with the bird-of-prey theme, and is also consistent with the "Twin Bird Strike" combo move.