In a quick brainstorm of combo guards who didn't have a quick first step, which Dellavadova certainly is:
BJ Armstrong, John Bagley, Dana Barros, Jon Barry, Steve Blake, Jose Calderon, Howard Eisley, Derrick Fisher, Boobie Gibson, Jeff Hornacek, Jarret Jack, Damon Jones, Steve Kerr, Andre Miller, Jameer Nelson, Tim Legler, John and Jim Paxson, Scott Skiles, Eric Snow, David Wesley, Charlie Ward, Greivis Vasquez, and all the veteran point guards over 30 who won playoff games on smarts and physicality after their quick left them: Late 80s Dennis Johnson, Mark Jackson after he left the Knicks, Houston era Kenny Smith, the last 5 seasons of Jason Kidd and Chauncey Billups, and Jason Williams when he was out of White Chocolate.
I'm sure there's more. If a player has a decent three point shot, knows how to run a team, and defends well, other positions can provide dribble penetration.