Forget the Wood Elves for now, their armybook is the most outdated and underperforming one
A lot of people will tell you to take Warriors of Chaos, they aren't wrong as it's an easy beginner army with a low body count, but they are kinda the Marines of Warhammer, they are everywhere
I don't like High Elves so I wouldn't advise you to take them, but it's completely biased :p
Bretonnians are an old army as well but they still perform well, even if their build options are a bit limited, you can have extremely cheap (we're talking about half
GW prices or less, for miniatures that are created by the Perry brothers here) and beautiful miniatures if you check the historical ranges:
The best ones,
Perry miniatures
and some other that are nice if you want a more early medieval look than late medieval
1st Corps /
Plastic 1st Corps
Crusader Miniatures
Plus this Bretonnian range could very easily double with Empire, just need some more infantry for the Empire and you're all set