I've picked up some dedicated DRAM testers over the years...
Combined, they can test 4516, 4164, 41256, 411000, and 44256.
Next, I have testbed systems that I can use to test 4k x 1 and 16k x 1 tri-votage DRAMs, 4416, and 4464 DRAMs.
And to round it out, my EPROM programmer will test various SRAMs and DRAMs as well.
I've also built a ZIP to DIP adapter to test 4464 ZIPs.