Rudy Gobert had the highest plus/minus in 2020-21, at +728.

Interpreted as:

NBA top plus minus by a player 2021

NAME	+/-	SEASON	TM	GP	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF
Rudy Gobert	+728	2020-21	UTA	71	30.8	14.3	13.5	1.3	0.6	2.7	1.7	5.5	8.2	67.5	0.0	0.1	0.0	3.3	5.3	62.3	2,187	1,015	960	89	40	190	118	163
Mike Conley	+548	2020-21	UTA	51	29.4	16.2	3.5	6.0	1.4	0.2	1.9	5.6	12.5	44.4	2.7	6.6	41.2	2.4	2.8	85.2	1,498	827	177	305	70	9	99	98
Royce O'Neale	+471	2020-21	UTA	71	31.6	7.0	6.8	2.5	0.8	0.5	1.2	2.5	5.5	44.4	1.5	3.9	38.5	0.5	0.6	84.8	2,241	496	485	181	57	32	83	182
Joe Ingles	+454	2020-21	UTA	67	27.9	12.1	3.6	4.7	0.7	0.2	1.7	4.1	8.4	48.9	2.7	6.1	45.1	1.1	1.3	84.4	1,867	809	244	318	45	12	117	120
Kawhi Leonard	+447	2020-21	LAC	52	34.1	24.8	6.5	5.2	1.6	0.4	2.0	8.9	17.5	51.2	1.9	4.9	39.8	5.0	5.7	88.5	1,773	1,292	337	269	81	21	105	82
Paul George	+432	2020-21	LAC	54	33.7	23.3	6.6	5.2	1.1	0.4	3.3	8.2	17.6	46.7	3.2	7.7	41.1	3.7	4.2	86.8	1,821	1,259	359	280	62	24	179	132
Bojan Bogdanovic	+419	2020-21	UTA	72	30.8	17.0	3.9	1.9	0.6	0.1	1.8	5.6	12.8	43.9	2.5	6.4	39.0	3.2	3.7	87.9	2,216	1,225	281	136	45	4	128	115
Giannis Antetokounmpo	+409	2020-21	MIL	61	33.0	28.1	11.0	5.9	1.2	1.2	3.4	10.3	18.0	56.9	1.1	3.6	30.3	6.5	9.5	68.5	2,013	1,717	671	357	72	73	207	168
Joel Embiid	+405	2020-21	PHI	51	31.1	28.5	10.6	2.8	1.0	1.4	3.1	9.0	17.6	51.3	1.1	3.0	37.7	9.2	10.7	85.9	1,585	1,451	539	145	50	69	159	123
Nikola Jokic	+384	2020-21	DEN	72	34.6	26.4	10.8	8.3	1.3	0.7	3.1	10.2	18.0	56.6	1.3	3.3	38.8	4.8	5.5	86.8	2,488	1,898	780	599	95	48	222	192
Jrue Holiday	+379	2020-21	MIL	59	32.3	17.7	4.5	6.1	1.6	0.6	2.2	7.0	13.9	50.3	1.9	4.8	39.2	1.8	2.3	78.7	1,907	1,046	268	357	96	37	127	98
Michael Porter Jr.	+360	2020-21	DEN	61	31.3	19.0	7.3	1.1	0.7	0.9	1.3	7.3	13.4	54.2	2.8	6.3	44.5	1.7	2.2	79.1	1,912	1,162	445	70	40	54	77	126
Georges Niang	+353	2020-21	UTA	72	16.0	6.9	2.4	0.8	0.3	0.1	0.7	2.5	5.6	43.7	1.7	4.1	42.5	0.3	0.3	95.7	1,154	500	176	59	25	8	51	116
Joe Harris	+350	2020-21	BKN	69	31.0	14.1	3.6	1.9	0.7	0.2	0.9	5.2	10.2	50.5	3.1	6.4	47.5	0.7	0.9	77.8	2,141	974	248	130	46	14	62	141
Nicolas Batum	+338	2020-21	LAC	67	27.4	8.1	4.7	2.2	1.0	0.6	0.8	2.9	6.1	46.4	1.6	4.1	40.4	0.7	0.9	82.8	1,835	540	316	148	69	37	53	102
Mikal Bridges	+337	2020-21	PHX	72	32.6	13.5	4.3	2.1	1.1	0.9	0.8	5.0	9.3	54.3	1.9	4.4	42.5	1.5	1.8	84.0	2,348	970	309	152	76	63	57	116
Devin Booker	+331	2020-21	PHX	67	33.9	25.6	4.2	4.3	0.8	0.2	3.1	9.3	19.2	48.4	1.9	5.5	34.0	5.1	5.9	86.7	2,270	1,712	281	289	53	16	207	181
Ben Simmons	+329	2020-21	PHI	58	32.4	14.3	7.2	6.9	1.6	0.6	3.0	5.6	10.1	55.7	0.1	0.2	30.0	3.0	4.9	61.3	1,877	829	417	401	93	35	173	171
Tobias Harris	+322	2020-21	PHI	62	32.5	19.5	6.8	3.5	0.9	0.8	1.7	7.6	14.9	51.2	1.3	3.4	39.4	2.9	3.3	89.2	2,014	1,210	419	220	55	51	107	119
Seth Curry	+319	2020-21	PHI	57	28.7	12.5	2.4	2.7	0.8	0.1	1.1	4.5	9.7	46.7	2.2	4.9	45.0	1.2	1.4	89.6	1,638	711	136	155	44	8	65	96
Danny Green	+312	2020-21	PHI	69	28.0	9.5	3.8	1.7	1.3	0.8	1.0	3.2	7.9	41.2	2.5	6.3	40.5	0.4	0.6	77.5	1,934	654	260	118	92	56	67	125
Brook Lopez	+312	2020-21	MIL	70	27.2	12.3	5.0	0.7	0.6	1.5	0.9	4.6	9.1	50.3	1.4	4.0	33.8	1.7	2.0	84.5	1,902	859	347	50	40	103	64	149
Chris Paul	+310	2020-21	PHX	70	31.4	16.4	4.5	8.9	1.4	0.3	2.2	6.3	12.6	49.9	1.5	3.7	39.5	2.4	2.6	93.4	2,199	1,149	312	622	99	19	156	166
Donte DiVincenzo	+304	2020-21	MIL	66	27.5	10.4	5.8	3.1	1.1	0.2	1.4	3.8	9.1	42.0	2.0	5.2	37.9	0.8	1.1	71.8	1,814	688	380	203	72	15	91	112
Jordan Clarkson	+301	2020-21	UTA	68	26.7	18.4	4.0	2.5	0.9	0.1	1.7	6.7	15.8	42.5	3.1	8.8	34.7	1.9	2.1	89.6	1,818	1,251	274	168	61	10	115	110