No president has ever been or will ever be perfect, but we’ve had some good steps since LBJ:
Clinton’s increased taxes on the rich, defense spending cuts, etc, got us our first and last government surplus years since '69, and made a little progress on welfare, but that was largely hampered by a Republican takeover of the House in '94
Obama passed the ACA, which was pretty meaningful to the middle class. Again, further progress got hampered by Republicans in congress in the later years of his presidency
Biden has passed the Inflation Reduction Act, which has lots of progressive incentives that benefit middle class families, including tax breaks for home efficiency improvements, renewable energy, and electric vehicles. He has also helped wipe away billions of dollars in student loan debts, benefiting middle class families (but again, you can thank Republicans for that not moving further or quicker)
You’ll note the constant tend though - since the president doesn’t write the laws, without congressional support, progressive ambitions get killed.