There's a list of micro-organisms tested in outer space here:
But it doesn't say the results of the tests.
Lichens certainly shown to survive:
When it comes to multicellular animals - then apart from the tardigrades, other ones of interest are Bdelloid rotifers
Bdelloid rotifers are radiation resistant animals
Two especially resistant species of bdelloid rotifers Adineta vaga and Philodina roseola survived 1000 grays of radiation and still had 10% of the population able to reproduce
For the original paper with the figures, see
They also survive 82 days storage in vacuum (followed by 30 minutes exposure to 100C)
But I can't yet find a record of them flown to space. Do say if anyone knows of one.
On micro-organisms, green algae (cyanobacteria), haloarchaea, radiodurans, are a few of the examples that are strongly UV / radiation resistance and that could survive the near vacuum conditions of the Mars surface.
Here are some of the candidate lifeforms for Mars - that's a near vacuum, for the habitats exposed to the atmosphere, but not all of these could survive the vacuum of space. This is a draft article I did for Wikipedia which turned out to be too specialist for them.
Some of the Expose R microbes survived both Mars and vacuum conditions, but I can't remember which now (when writing that I was more interested in whether they could survive on Mars).
I'll see if I can find a more complete list of the ones that can survive vacuum conditions.