I think Kiprusoff has a very strong case. The issues with him are, he didn't become a winning goaltender of particular note (in the NHL) until he was 27, so his prime years weren't the longest on record. But that whole period from 2003-04 to 2011-12 (2012-13 they went back into the crapper), the Flames had a very competitive club -- 1 win from the Cup in '04 -- and basically had only two above-average NHL players, one of whom was Kipper. So, in the sense that he was usually the co-best player on his team, over a nine-year (eight season) period, is a strong case for Hall of Fame induction, I think.
I dunno, I feel like Beezer and Barrasso and Liut and Moog were rarely the best players on their teams (Beezer being an exception for a couple years with Florida, and Liut in 1981). So, I think Kiprusoff carried a heavier burden for his team, and he seemed more consistent. He was playing nearly all the games for Calgary from 2005 to 2012. And there were a lot of times, even during their primes, when Beezer, Barrasso, Liut and Moog looked very bad in big moments (Liut at '81 Canada Cup Final and the NHL season that followed; Moog in the '90 Finals and the first round in'97, for example). Obviously Kiprusoff, like any goalie, had his bad moments in his prime years, too, but I feel he was a lot more consistent, without the dramatic highs and lows -- though, admittedly, that may in part be due to the lower-scoring era he played in.
I feel much the same about Curtis Joseph as about Kiprusoff, but maybe his moving around to different teams a lot in his prime looks a little less attractive. But I think he and Kiprusoff occupy vaguely similar ground, in that they often had to carry teams and were more consistent than those other guys.
Tim Thomas is such a unique case because he became a notable NHL-er so late, and then suddenly had two seasons (out of three) that rank among the greatest-ever for any player in his era... then, one year later was gone from Boston and became unnoticed and soon retired. It's a weird career curve. Based on peak level, he's up with there Roy and Sawchuk, but based on career achievements, consistency, longevity, etc., he's not even a major NHL figure. It's a strange one.
I am in the Marc-Andre Fleury camp, as I think he's great. Is he a Hall of Famer...? That's another question. He's closer to the "Beezer and Barrasso and Liut and Moog" school, with the high peaks and some notably disappointing lows. These last two years with Vegas have certainly helped his case, though. But five trips to the Finals (albeit one riding the bench all playoffs) is nothing to sneeze at in today's era.