What's wrong with Giroud? Always bangs in 30+ for me.
If you can... I strongly recommend Benteke, failing so; Jelle Vossen will score goals; when required.
Ishak belfodil. If he can come in cheap. Or destro. But play them if you can. They can develop very nicely as well. :)
Your best option and an awesome player is IAGO ASPAS who has a 8.75m release clause.
Kweuke is a good first-team striker for most prem teams - would be solid backup and challenge for the first team at least. Can't remember his price, but somewhere around 4-6m