I understand where you're coming from, but to claim that Marvel doesn't make new heroes is maybe just a little bit disingenuous.
Characters on these covers that were introduced since the year 2000:
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America Chavez (2011)
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Silk (2014)
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Spider-Gwen (2014)
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Fantomex (2002)
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Hulkling (2005)
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Wiccan (2005)
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Agent Coulson (2008)
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Nico Minoru (2003)
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Kamala Khan (Ms Marvel) (2013)
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Half the people on the Web Warriors cover
I'm not counting Miles since you don't seem to like that he's also "Spider-Man" even though that shouldn't really matter. There's also two people I don't recognize on the Uncanny Inhumans cover, IDK if they're new.