I skipped answering this earlier, but now reading some more responses, I would like to weigh in. I only have the E25, so I cant itemize them, but I will respond to some other comments about WHY you should consider each tank.
I did look at your page and yeah, your stats are lower than most, but that just tells me that you are here for the "Fun of It"and not to become a professional gamer. Yes, there is something to be said about "Winning is more fun" but, winning in a lame tank isnt much fun either. My top 3 tanks as far as WR goes (Tiers 5-10) are the Agent, Spike, and Angry Conner, but I have very few "Fun" games in those. I played them enough to know I just dont like them, regardless of their WR.
My most fun tanks are the Annihilator, Gravedigger, and Black Prince!! So much fun in these tank!! The TOG, AT7, and E25 ar straight up gun games, win or lose, and MOST of these are in the 40s WR% for me. So, not a lot of wins, but so much fun.
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THAT SAID, it looks like you run to the IS-style tanks in your games most of the time. If you like THAT style of play, it looks like the 252 might be more for you. BUT, you were saying you were looking for diversity, and the Lorraine would be closer to your other top used tanks than the E25. The E25 is definitely more diversity for your garage, but, it plays a lot like the Hetzer and Alecto, both of which you didnt play much. For me, the list would be the E25, Lorraine, then the 252, but I would say the opposite would be true for you.
So, based on your history, I would suggest:
252 - for familiarity
Lorraine - for diversity
E25 - nah