Rantanen cut it to 4-2 on a wraparound at 6:29 of the third, and Nathan MacKinnon made it 4-3 just 20 seconds later at 6:49 with a wrist shot from the right circle.
"The first period, [we] gave up three goals right away. It's tough to come back, [but] we did," Rantanen said. "It [stinks], the end there. Their goal, we almost got a kill and then 10 seconds left, they score."
Compher tied it 4-4 at 12:07 when he beat Bobrovsky from between the circles.
The goal came after Artturi Lehkonen had one taken away at 11:11 after video review determined Avalanche defenseman Devon Toews preceded the puck into the offensive zone.
"I thought we did a good job of composing ourselves. They came at us hard," Bennett said. "They capitalized, and then we did a good job of resetting, refocusing, and just going out there and playing. And Tkachuk got the job done."
NOTES: The Panthers became the first NHL team since the Philadelphia Flyers on March 18, 2021, to win in regulation after giving up a lead of three goals or more in the third period. … Tkachuk extended his point streak to four games (five goals, three assists) and reached 50 points (22 goals, 29 assists) in the fewest games of his NHL career (39). Tkachuk, who is on pace for his second straight 100-point season, became the third player in Panthers history to get 50 points in 39 or fewer games, joining Pavel Bure (34 in 1999-00) and Jonathan Huberdeau (37 in 2021-22, 38 in 2019-20). … Georgiev has started each of Colorado's last 12 games, the longest streak of his career.