If we sans Rajdhani/Duronto then Below trains are having very aggressive schedule.
1) NZM-BDTS GR
2) NZM-BDTS YUVA
3) Howrah-NDLS Yuva
4) NZM-MAS GR
5)...
more... LTT-NZM AC
6) Sampark Kranti
7) TN
8) KSK (Via Kacheguda)
9) MSK
First 5 train has very aggressive TT like Rajdhani & Rest 4 has Best Possible TT Which Genuine SF should have.