3.11Add 9ths

Try:

Cmaj9: LH C RH E-B-D

Am9: LH A RH G-C-B

Dm9: LH D RH F-C-E

G13: LH G RH F-B-E

Then:

Cmaj9: LH C RH E-B-D

Now the progression sounds immediately more polished.