Earlier, I said you must either own it or be good with the current situation.
First of all, whether you like it or not, singing drives it all—if you can't sing it, it doesn't matter how well everybody else in the band plays it. It is a well-established fact that singers rarely own anything other than mics (maybe), and this is at least partly because their contribution is so pivotal and dramatic to a band's ultimate success. A really compelling lead vocalist is money in the bank. If you're lucky, yours isn't a hopeless egomaniac, because THAT'S not unusual either. This might be the best you can do with a lead vocalist. Get over it.
On the other hand, a drummer without drums is absurd, and you cannot accept one without drums. If you like his groove enough to keep him, you must set a deadline past which your drums are not available anymore, when he must produce his own stage-worthy kit. Talented drummers are very common, especially when the gig is solid. This is the stand you must take.
It is not your job or responsibility to equilibrate everybody's investment so that everybody has the same amount of skin in the game. Each individual player is responsible for his/her own sound and gear. That's why your unequipped drummer is the only thing here that is truly 'not like the other'. If you're really on the brink of success, you just have to be ready to turn him into Peter Best.