Well, considering that Jason doesn't really have much chance of hurting Hellboy, I think Hellboy would eventually just rip him limb from limb and bury each piece in a different part of the world. I'd call that a win.
Beta Ray Bill and Thor are exact equals in power, but Thor has the advantage of 600+ years of experience, so in a real fight to the death, Thor would win because at the end he could merge his godly essence with Mjolnir for a blast more powerful than anything Bill could accomplish, since Bill is not a god.
On a side note, Lobo is a terrible character and Wolverine would eat him for breakfast (perhaps even literally).
I am a Web Developer for GarageGames, in Oregon. I've been out of touch with comics for while since me previous job didn't pay very well. I'm hoping to start collecting again, if I can figure out what's going on these days. I also play lots of video games.
Unfortunately my comics are half-way across the country right now, so I couldn't really fill in lots of information on my pages. Ah well, I tried. Congrats to the winners. I can take some pride in the fact that my magic image code is used everywhere now. Stage one of my master plan complete. MUAHAHAHAHAHAHAHAHAHA!