People care way too much about fg% when assessing clutch. Clutch is everything, not just scoring.

Here is the 1997-2013 top best 4th quarter teams by net rating:

2009 Cavaliers: +39.9
2013 Heat: +33.7
2011 Mavericks: +29.5
2007 Mavericks: +29.0
2006 Clippers: +27.1
2010 Cavaliers: +26.4
1998 Lakers: +26.2
1999 Magic: +25.7
2008 Cavaliers: +24.2
2004 Pacers: +23.

Idk what it would look like updated but I’d say this list strongly suggests

1. Lebron

2. Dirk

for that time period