Good, free? No. Not for long at any rate. Any good free one will quickly become swamped. You'd spend longer keeping on top of things than you'd spend benefiting from them.
Far wiser to look for a paid VPN service or to consider investing in a seedbox.
TOR is not designed for torrents, they'll crawl along.
Also, remember that "good" to you might mean speed, but also consider privacy too; if you're looking for a proxy I'm going to go out on a limb and suspect that the torrents aren't entirely above board, therefore you might want to check what territory your prospective seedbox or VPN service is based in & what they state about logging.