I kjnow that there have been other types of humans in the past (other species, but I believe that we could breed with them).
My count is:
Neanderthal
Cro Magnum
Those little pygmies foundon that island a few years ago.
Have there been any others?
Any other species that existed at the same time as us, and had as much chance as us to become masters of the planet?
Here’s a good overview: Human evolution - Wikipedia
Cro-Magnon (it’s a French name; a Cro Magnum would be a large handgun or champagne bottle belonging to a blackbird), please!
There appear to have been 12 species within genus Homo, plus at least four other genera within the Tribe.
And as I mentioned in a GD thread earlier, Cro Magnons are us. They’re just a group of H. sapiens sapiens who happened to live before writing.
By my count, 10 types. Those who understand binary and those who don’t. 
Seriously, though, can we count Neanderthals and the ‘hobbits*’ as human? Intelligent, sure, but members of our species? I can see being able to breed with Neanderthals, but the hobbits seem like an awful stretch. And presumably fertile offspring is the criteria for being human.
*- I assume the island pygmies in the OP refer to the finds in Indonesia popularly dubbed hobbits.
Neanderthals are generally considered to be a different species from us, and H. floriensis almost certainly was. But then you have to ask what “human” means: Is it “Homo sapiens”, or just “any member of the genus Homo”? The OP is apparently referring to the genus, since he specifically says “other species” in the OP.
Tbh, I’m really just interested in other species that could, possibly, have become what we would term “intelligent” (talking, building, inventing etc), but I was specifically referring to the genus, since I understood that that contained every intelligent species to appear.
There’s a fair amount of evidence that Neanderthals could conceptualize and form abstract associations of various sorts (e.g., flowers in a grave). Interpretations of what their soft tissues probably were suggest they were not able to talk in the sense we can, though they undoubtedly could make a variety of different sounds. Whether these sounds comprised any form of language is debatable – as, indeed, are the inferences about their pharynx that would say whether they were physiologically able to talk. If they weren’t “human” by some abstract standard, then they were at least very, very close to it.
“Human” is generally considered to apply to members of the genus Homo. It is really impossible to come up with a definite count of species, since opinions differ among anthropologists (and how you wish to define species). However, I would say that at least the following species are generally accepted:
Homo habilis - Some consider this to belong to Australopithecus
Homo ergaster - Possibly just early H. erectus
Homo erectus
Homo heidelbergensis
Homo neanderthalensis - now generally considered to be separate from H. sapiens
Homo floresiensis - whether it was a separate species is still disputed by some
Homo sapiens - includes Cro-Magnons
As I mentioned in another thread, I don’t find the arguments about tissues convincing because modern humans will use a complex language regardless of their physiology, as shown by communities of deaf people who will spontaneously develop a sign language.
So, no argument about a Neanderthal’s larynx is going to convince me. If they were mentally similar to us, they used a language, even if they were only able to voice the sounds “baa” and “buu” : sign language, grunt language, whistle language, whatever, but they had it. So, as long as I’m not presented with some informations (that to my knowledge we don’t have) about their brains and/or mental processes, I’m going to dismiss the relevance of the arguments based on their larynx.