Top 5 toughest/most defensive German monster tanks within Gerand

Take this with a grain of salt as well as try to correct me if I’m wrong but here’s goes nothing

(I’m ranking this assuming the German monster has make a note worthy appearance/presence, already appears and not in the works such as the German Vostok, and it’s appears within at least 5 to 7 episodes and not just a random German monster)

1: electro goose (version 1 and 2)
2: fortress goose
3: titan ratte
4: Karl-44
5: armored train

Honorable mentions:
flamethrower goose
Grossturman
German is-44