Okay, just making sure so we had the proper citation, if needed.
Our 'emotional' leaders, at least the ones in my definition that show fiery and passionate emotion while also being leading performers, are guys like Steve Smith and Terrell Suggs. You may see young guys grow into that - Brandon Williams, Terrance West, Tavon Young, Timmy Jernigan, Ryan Jensen, etc - and/or veterans get more comfortable and vocal - Eric Weddle, Mike Wallace.
This isn't a comprehensive list by any means, just guys I've seen enough of or noticed something by the way they play/behave.