All air purifiers use HEPA filters, so they'll do a great job in filtering. You can even get a household fan and slap on a HEPA filter since it's all about pushing air through a filter. It's all about design, costs of new filters (and how long they last which is typically just based on size/surface area, and specs such as CADR which measures how much clean air it can purify.

Coway Airmega (the one that usually always wins in reviews), Levoit (small size for rooms with decent CADR), Honeywell (often used in offices), Blueair and SmartAir all do very well so choose based on specs, price and design. I always loved Coway Airmega and Levoit 300 personally but seeing tosernameschescksout's suggestion of smartairtfilters looks very impressive - both in design and in CADR performance, and price.