When used appropriately though, it's a stellar tool to have in your arsenal and will help when combined with some voice training. It can only do so much good before it starts to cause even more problems (for example, sounding nasally, flat, robotic, etc) and it will NOT be enough on it's own to get you to where you want to be. Just be mindful that EQ is a scalpel, not a butcher's knife. This isn't even a trans-explicit thing - a lot of people tweak mic EQ to get the sound they want. In addition to voice training (as others suggested) all you can really do is use an EQ to try to downplay the undesirable parts of your vocal range and emphasize the parts you want to hear.
