Tyson Chandler, Theo Ratliff, Tyrus Thomas, Desagna Diop, Taj Gibson, Joakim Noah, Anderson Varejao, Rasheed Wallace, Kendrick Perkins, DeAndre Jordan, Hasheem Thabeet, Steven Hunter, Jermaine O'neal, Joel Anthony, Emeka Okafor, Paul Millsap, Jason Thompson, DJ Mbenga, Marcin Gortat, Adonal Foyle, Brendan Haywood, Erick Dampier, Tony Battie, Josh Boone, Kenyon Martin, Chris Anderson, Roy Hibbert, Jeff Foster, Jason Maxiell, Ben Wallace, Reggie Evans, Amir Johnson, Rasho Nesterovich, Chuck Hayes, DeJuan Blair, Louis Amundson, Robin Lopez, Serge Ibaka, Etan Thomas, Darko Millicic, Ryan Hollins, Marcus Camby, Joel Pryzbilla, Greg Oden, Anthony Randolph, Brandon Wright, Andres Biedrins, Ronny Turiaf, Javale McGee, Sean Williams. There's quite a few other post defenders out there that I didn't name because they just don't get minutes. David Anderson comes to mind, as does Dwayne Jones. Hamed Haddadi is another. I also left off player who play offense like Howard, Bogut, Bynum, Garnett to name a few.
Getting a shotblocker isn't this impossible task you seemingly are making it out to be. We can trade for one. There's a few out there as Free Agents who should come cheap. I would LOVE to see us get Sean Williams. Also the draft is full of shotblocking bigs. Pretty deep draft in that regard. And I know for a fact the Sixers are interested in quite a few of them like Aldrich, Udoh, Jordan, Alabi, and Favors, and have the pieces to land a pick in the 10-15 range for Udoh or Aldrich, or a later pick for Jordan or Alabi. And let's not act like Brand is an awful defender. He's still a good post defender. Probably not the shot blocker he used to be, but his physicality, great length, and instincts still make him a good defender/rebounder. I personally am expecting a good year from him being used correctly. Jason Smith is a decent shot blocker as well. Post defender, no, but he'll get you some blocks.