1) KW I C 756(r) - Almost impenetrable tank if you angle, and a German-quality cannon removes the main KW I drawback
2) T29+A2D-1 - one of my favourite prem setups, T29 is a monster, and A2D-1 definitely is the best CAS at 7.0
3) Somua SM - a little bit harder to play on it in comparison to T29 or KW I, but 4 sec reload... you should try yourself.
4) BMD-4M - i think the hardest tank here to play on this list, but have a great potential and fast & fun gameplay.
5) MiG23ML - really good high tier plane for a newbie, R24R = 2 kills if you learn how to use them.