I mine bitcoin and make a profit off of it. I'm not saying that it is the best, but it is definitely profitable
I have my reasons to highly doubt that, but I'll go ahead and try to give a reasonable answer to OP.
The profitability of each coin changes constantly, therefore, we cannot answer which coin is the most profitable to mine currently. The most known ones to be mined currently are Ethereum, ZCash and their similar Ethhash and Equihash coins, like Musiccoin (Ethhash) or ZenCash (Equihash).
Check Whattomine.com you will find plenty of information there. Also, try using Nicehash on your machine, it will benchmark all available algorithms and choose the most profitable one.