Bobby Orr has the highest plus/minus by a Hart Trophy winner in a season, at +124 in 1970-71.

Interpreted as:

best plus minus by an mvp in a regular season by a player

	NAME	+/-	HART	SEASON	TM	GP	G	A	P	PIM	PPG	PPA	SHG	SHA	GWG	OTG	S	S%	FOW	FO	FOW%	HIT	BKS	TKA	GVA	TOI/GP
1	Bobby Orr B. Orr	+124	1	1970-71	BOS	78	37	102	139	91	5	44	3	10	5		392	9.4
2	Wayne Gretzky W. Gretzky	+100	1	1984-85	EDM	80	73	135	208	52	8	36	11	7	7	0	354	20.6
3	Guy Lafleur G. Lafleur	+89	1	1976-77	MTL	80	56	80	136	20	14	18	0	0	8		290	19.3
4	Bobby Clarke B. Clarke	+83	1	1975-76	PHI	76	30	89	119	136	10	28	4	2	2		194	15.5
5	Bobby Orr B. Orr	+83	1	1971-72	BOS	76	37	80	117	106	11	24	4	5	4		353	10.5
6	Wayne Gretzky W. Gretzky	+80	1	1981-82	EDM	80	92	120	212	26	18	39	6	2	12		370	24.9
7	Bobby Clarke B. Clarke	+79	1	1974-75	PHI	80	27	89	116	125	10	24	3	2	4		195	13.8
8	Wayne Gretzky W. Gretzky	+78	1	1983-84	EDM	74	87	118	205	39	20	27	12	11	11	0	326	26.7
9	Bryan Trottier B. Trottier	+76	1	1978-79	NYI	76	47	87	134	50	15	29	0	0	8		187	25.1
10	Guy Lafleur G. Lafleur	+73	1	1977-78	MTL	78	60	72	132	26	15	21	0	0	12		305	19.7
11	Wayne Gretzky W. Gretzky	+71	1	1985-86	EDM	80	52	163	215	46	11	43	3	15	6	1	350	14.9
12	Wayne Gretzky W. Gretzky	+69	1	1986-87	EDM	79	62	121	183	28	13	33	7	6	4	0	288	21.5
13	Wayne Gretzky W. Gretzky	+61	1	1982-83	EDM	80	71	125	196	59	18	36	6	4	9		348	20.4
14	Mario Lemieux M. Lemieux	+55	1	1992-93	PIT	60	69	91	160	38	16	39	6	3	10	0	286	24.1
15	Phil Esposito P. Esposito	+55	1	1968-69	BOS	74	49	77	126	79	10	29	2	2	9		351	14.0
16	Bobby Orr B. Orr	+54	1	1969-70	BOS	76	33	87	120	125	11	40	4	1	3		413	8.0
17	Peter Forsberg P. Forsberg	+52	1	2002-03	COL	75	29	77	106	70	8	25	0	0	2	1	166	17.5	333	709	47.0	39	9	23	31	19:20
18	Chris Pronger C. Pronger	+52	1	1999-00	STL	79	14	48	62	92	8	18	0	3	3	0	192	7.3	0	1	0.0	106	185	61	93	30:14
19	Phil Esposito P. Esposito	+51	1	1973-74	BOS	78	68	77	145	58	14	26	4	2	9		393	17.3
20	Sergei Fedorov S. Fedorov	+48	1	1993-94	DET	82	56	64	120	34	13	15	4	7	10	2	337	16.6
21	Joe Sakic J. Sakic	+45	1	2000-01	COL	82	54	64	118	30	19	27	3	3	12	2	332	16.3	1,214	2,292	53.0	44	54	79	54	23:01
22	Wayne Gretzky W. Gretzky	+41	1	1980-81	EDM	80	55	109	164	28	15	38	4	3	3		261	21.1
23	Stan Mikita S. Mikita	+40	1	1966-67	CHI	70	35	62	97	12	8	22	1	1	5		279	12.5
24	Nathan MacKinnon N. MacKinnon	+35	1	2023-24	COL	82	51	89	140	42	10	38	0	0	9	2	405	12.6	607	1,314	46.2	55	69	42	82	22:49
25	Henrik Sedin H. Sedin	+35	1	2009-10	VAN	82	29	83	112	48	4	23	2	0	5	0	166	17.5	756	1,527	49.5	13	13	44	42	19:41