Playoff Push. Help! QB Mess

I got a trade offer:
I receive Derek Carr or Drew Brees or Carson Wentz.
They receive Zach Ertz.
I only consider this because Greg Olsen is a free agent so I could possibly pick him up.
My team:
WR: M Thomas, Diggs, Allen, Sanders
RB: D Johnson, Hunt, Kamara, Mixon, D Lewis
TE: Zach Ertz
QB: Taylor & Manning
Should I take a shot and make the trade for one of these QB’s while picking up Olsen or should I hold tight because Manning has a favorable end of season schedule while picking up Bortles.

Zach Ertz is too valuable to trade for a QB.