Is there a strategy game...

[Eduard]

... that is large scale (so large maps, many units --> not like Company of Heroes) and allows for legit strategies / tactics, such as large flanking maneuvers and stuff like that, instead of just zerg rushes and rock-paper-scissor sort of stuff?

Vague, I know.

I've been searching the internet for a bit now, and all I found was the Total War series, of which I already have Medieval 2 (which isn't that great).

How about Grand Strategy titles like the Hearts of Iron or Europa Universalis series?

Or perhaps Crusader Kings as well.

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King Eduard is the greatest